There are a number of expected unused resources in these files that huayinz@ added as part of our effort to unify and restrict text styles in Chrome. They should all be annotated with tools:ignore="UnusedResources", though. If there's some we missed that are related to the text styles we can go back and add the annotations. If there are non-text style resources being flagged as unused we'll need to investigate to determine what to do.
    <ignore regexp="ui/android/java/res/values/colors.xml"/>
    <ignore regexp="ui/android/java/res/values/dimens.xml"/>
    <ignore regexp="ui/android/java/res/values-v17/styles.xml"/>

This is used in chrome/android/java/res/values-v17/styles.xml for FullscreenNotificationBubble, which appears to be unused. We can probably remove the style and the animation XML. [i]
    <ignore regexp="chrome/android/java/res/anim/fullscreen_notification_in.xml"/>

Are there specific resources in that are being flagged as used?
    <ignore regexp="chrome/android/java/res/values-v17/styles.xml"/>
    <ignore regexp="chrome/android/java/res/values-v21/styles.xml"/> 


[i] Usage was removed in this CL https://chromium.googlesource.com/chromium/src/+/a224d9458b3ba16f814bed2c925b07c36ad27ea7

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/78988928ff8dd13b8fd16017c617ee5ad76c7cd8

commit 78988928ff8dd13b8fd16017c617ee5ad76c7cd8
Author: Peter Wen <wnwen@chromium.org>
Date: Mon Jan 29 15:16:52 2018

Android: Remove unused strings

Update suppressions from android_tools upgrades resulting in unused
resources (mostly strings) being left behind after their feature is
removed.

Also update some suppressions as expected.

BUG= 799070 , 806060 
TBR=nyquist@chromium.org

Change-Id: I30d35320ad20b318a921972529f139b3b3e65453
Reviewed-on: https://chromium-review.googlesource.com/886863
Commit-Queue: Peter Wen <wnwen@chromium.org>
Reviewed-by: Peter Wen <wnwen@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532433}
[modify] https://crrev.com/78988928ff8dd13b8fd16017c617ee5ad76c7cd8/build/android/lint/suppressions.xml
[modify] https://crrev.com/78988928ff8dd13b8fd16017c617ee5ad76c7cd8/chrome/android/java/res/values/dimens.xml
[modify] https://crrev.com/78988928ff8dd13b8fd16017c617ee5ad76c7cd8/chrome/android/java/strings/android_chrome_strings.grd
[modify] https://crrev.com/78988928ff8dd13b8fd16017c617ee5ad76c7cd8/chrome/test/android/javatests/src/org/chromium/chrome/test/util/TranslateUtil.java

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4719ef1a70a4f19bf8546d124e684074450f5985

commit 4719ef1a70a4f19bf8546d124e684074450f5985
Author: Peter Wen <wnwen@chromium.org>
Date: Mon Jan 29 16:42:04 2018

Revert "Android: Remove unused strings"

This reverts commit 78988928ff8dd13b8fd16017c617ee5ad76c7cd8.

Reason for revert: Broke clank downstream unused resources

Original change's description:
> Android: Remove unused strings
> 
> Update suppressions from android_tools upgrades resulting in unused
> resources (mostly strings) being left behind after their feature is
> removed.
> 
> Also update some suppressions as expected.
> 
> BUG= 799070 , 806060 
> TBR=nyquist@chromium.org
> 
> Change-Id: I30d35320ad20b318a921972529f139b3b3e65453
> Reviewed-on: https://chromium-review.googlesource.com/886863
> Commit-Queue: Peter Wen <wnwen@chromium.org>
> Reviewed-by: Peter Wen <wnwen@chromium.org>
> Reviewed-by: Theresa <twellington@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#532433}

TBR=nyquist@chromium.org,wnwen@chromium.org,twellington@chromium.org

Change-Id: I0681082ac3fdfe80d1ad6f3ba182e81f75678dce
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  799070 ,  806060 
Reviewed-on: https://chromium-review.googlesource.com/890660
Reviewed-by: Peter Wen <wnwen@chromium.org>
Commit-Queue: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532458}
[modify] https://crrev.com/4719ef1a70a4f19bf8546d124e684074450f5985/build/android/lint/suppressions.xml
[modify] https://crrev.com/4719ef1a70a4f19bf8546d124e684074450f5985/chrome/android/java/res/values/dimens.xml
[modify] https://crrev.com/4719ef1a70a4f19bf8546d124e684074450f5985/chrome/android/java/strings/android_chrome_strings.grd
[modify] https://crrev.com/4719ef1a70a4f19bf8546d124e684074450f5985/chrome/test/android/javatests/src/org/chromium/chrome/test/util/TranslateUtil.java

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/694bf0eb3c5de0a290054716b548e4cadf9284ee

commit 694bf0eb3c5de0a290054716b548e4cadf9284ee
Author: Peter Wen <wnwen@chromium.org>
Date: Mon Jan 29 18:54:57 2018

Reland "Android: Remove unused strings"

Original CL: https://chromium-review.googlesource.com/886863

Fix:
- Suppress unused resources for clank/ widgets

BUG= 799070 , 806060 
TBR=nyquist@chromium.org,twellington@chromium.org

Change-Id: Id42c5a626f4a0754bea3d4db7a10af9756c0002d
Reviewed-on: https://chromium-review.googlesource.com/891339
Commit-Queue: Peter Wen <wnwen@chromium.org>
Reviewed-by: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532516}
[modify] https://crrev.com/694bf0eb3c5de0a290054716b548e4cadf9284ee/build/android/lint/suppressions.xml
[modify] https://crrev.com/694bf0eb3c5de0a290054716b548e4cadf9284ee/chrome/android/java/res/values/dimens.xml
[modify] https://crrev.com/694bf0eb3c5de0a290054716b548e4cadf9284ee/chrome/android/java/strings/android_chrome_strings.grd
[modify] https://crrev.com/694bf0eb3c5de0a290054716b548e4cadf9284ee/chrome/test/android/javatests/src/org/chromium/chrome/test/util/TranslateUtil.java

Here are the chrome_java unused resources:

chrome/android/java/res/values-v21/styles.xml:116 The resource `R.style.PopupWindow_LowEnd` appears to be unused: UnusedResources [warning]
    <style name="PopupWindow.LowEnd" parent="android:Widget.Material.Light.PopupWindow">
           ~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:406 The resource `R.style.MediaNotificationTitle` appears to be unused: UnusedResources [warning]
        name="MediaNotificationTitle"                                                                                                                                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:409 The resource `R.style.MediaNotificationText` appears to be unused: UnusedResources [warning]
        name="MediaNotificationText"
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:412 The resource `R.style.RemoteNotificationTitle` appears to be unused: UnusedResources [warning]
        name="RemoteNotificationTitle"
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:415 The resource `R.style.RemoteNotificationText` appears to be unused: UnusedResources [warning]
        name="RemoteNotificationText"
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:418 The resource `R.style.RemoteNotificationProgressBar` appears to be unused: UnusedResources [warning]
        name="RemoteNotificationProgressBar"
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:603 The resource `R.style.LocationBarMenuButton` appears to be unused: UnusedResources [warning]
    <style name="LocationBarMenuButton" parent="LocationBarButton">
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:679 The resource `R.style.ListMenuStyle` appears to be unused: UnusedResources [warning]
    <style name="ListMenuStyle" parent="Widget.AppCompat.ListPopupWindow">
           ~~~~~~~~~~~~~~~~~~~~

Here are the ui_java unused resources:

ui/android/java/res/values/colors.xml:13 The resource `R.color.google_blue_300` appears to be unused: UnusedResources [warning]                                                  
    <color name="google_blue_300">#7BAAF7</color>
           ~~~~~~~~~~~~~~~~~~~~~~
ui/android/java/res/values/colors.xml:14 The resource `R.color.google_blue_500` appears to be unused: UnusedResources [warning]
    <color name="google_blue_500">#4285F4</color>
           ~~~~~~~~~~~~~~~~~~~~~~
ui/android/java/res/values/dimens.xml:10 The resource `R.dimen.headline_size_medium` appears to be unused: UnusedResources [warning]
    <dimen name="headline_size_medium">20sp</dimen>
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~
ui/android/java/res/values-v17/styles.xml:54 The resource `R.style.BlackHeadline2` appears to be unused: UnusedResources [warning]
    <style name="BlackHeadline2" parent="RobotoMediumStyle">                                                                                                                                ~~~~~~~~~~~~~~~~~~~~~
ui/android/java/res/values-v17/styles.xml:62 The resource `R.style.BlackTitle2` appears to be unused: UnusedResources [warning]
    <style name="BlackTitle2" parent="RobotoMediumStyle">
           ~~~~~~~~~~~~~~~~~~
ui/android/java/res/values-v17/styles.xml:98 The resource `R.style.BlackButtonText` appears to be unused: UnusedResources [warning]
    <style name="BlackButtonText" parent="RobotoMediumStyle">
           ~~~~~~~~~~~~~~~~~~~~~~
ui/android/java/res/values-v17/styles.xml:113 The resource `R.style.WhiteHeadline2` appears to be unused: UnusedResources [warning]
    <style name="WhiteHeadline2" parent="RobotoMediumStyle">
           ~~~~~~~~~~~~~~~~~~~~~
ui/android/java/res/values-v17/styles.xml:129 The resource `R.style.WhiteTitle2` appears to be unused: UnusedResources [warning]
    <style name="WhiteTitle2" parent="RobotoMediumStyle">
           ~~~~~~~~~~~~~~~~~~
ui/android/java/res/values-v17/styles.xml:140 The resource `R.style.BlueButtonText1` appears to be unused: UnusedResources [warning]
    <style name="BlueButtonText1" parent="RobotoMediumStyle">
           ~~~~~~~~~~~~~~~~~~~~~~
ui/android/java/res/values-v17/styles.xml:144 The resource `R.style.BlueButtonText2` appears to be unused: UnusedResources [warning]
    <style name="BlueButtonText2" parent="RobotoMediumStyle">
           ~~~~~~~~~~~~~~~~~~~~~~

I'm not sure about this one

chrome/android/java/res/values-v21/styles.xml:116 The resource `R.style.PopupWindow_LowEnd` appears to be unused: UnusedResources [warning]
    <style name="PopupWindow.LowEnd" parent="android:Widget.Material.Light.PopupWindow">
           ~~~~~~~~~~~~~~~~~~~~~~~~~


The media and remove styles that are unused can probably be removed

chrome/android/java/res/values-v17/styles.xml:406 The resource `R.style.MediaNotificationTitle` appears to be unused: UnusedResources [warning]
        name="MediaNotificationTitle"                                                                                                                                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:409 The resource `R.style.MediaNotificationText` appears to be unused: UnusedResources [warning]
        name="MediaNotificationText"
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:412 The resource `R.style.RemoteNotificationTitle` appears to be unused: UnusedResources [warning]
        name="RemoteNotificationTitle"
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:415 The resource `R.style.RemoteNotificationText` appears to be unused: UnusedResources [warning]
        name="RemoteNotificationText"
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:418 The resource `R.style.RemoteNotificationProgressBar` appears to be unused: UnusedResources [warning]
        name="RemoteNotificationProgressBar"
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:603 The resource `R.style.LocationBarMenuButton` appears to be unused: UnusedResources [warning]
    <style name="LocationBarMenuButton" parent="LocationBarButton">
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~


This can definitely be removed:

chrome/android/java/res/values-v17/styles.xml:679 The resource `R.style.ListMenuStyle` appears to be unused: UnusedResources [warning]
    <style name="ListMenuStyle" parent="Widget.AppCompat.ListPopupWindow">
           ~~~~~~~~~~~~~~~~~~~~



The ui_java unused resource warnings should be suppressed.

Thank you Theresa, I'll suppress the ui_java ones and try removing as many of the other ones as I can.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d9e95344fb0ec1680fc3416a1cbdbc5272ab97be

commit d9e95344fb0ec1680fc3416a1cbdbc5272ab97be
Author: Peter Wen <wnwen@chromium.org>
Date: Thu Feb 01 22:13:37 2018

Android: Remove more unused resources

ui_java resources are intended to be used later. Other resources were no
longer being used.

Bug:  806060 
Change-Id: Ifde5a469adc0453e65483d6988dcbb3dc4a1a876
Reviewed-on: https://chromium-review.googlesource.com/896405
Commit-Queue: Peter Wen <wnwen@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533830}
[modify] https://crrev.com/d9e95344fb0ec1680fc3416a1cbdbc5272ab97be/build/android/lint/suppressions.xml
[delete] https://crrev.com/a0dae6504945b7d6d81ede22b87e0ca7cbca5124/chrome/android/java/res/anim/fullscreen_notification_in.xml
[modify] https://crrev.com/d9e95344fb0ec1680fc3416a1cbdbc5272ab97be/chrome/android/java/res/values-v17/styles.xml
[modify] https://crrev.com/d9e95344fb0ec1680fc3416a1cbdbc5272ab97be/chrome/android/java/res/values-v21/styles.xml
[modify] https://crrev.com/d9e95344fb0ec1680fc3416a1cbdbc5272ab97be/ui/android/java/res/values-v17/styles.xml
[modify] https://crrev.com/d9e95344fb0ec1680fc3416a1cbdbc5272ab97be/ui/android/java/res/values/colors.xml
[modify] https://crrev.com/d9e95344fb0ec1680fc3416a1cbdbc5272ab97be/ui/android/java/res/values/dimens.xml

Lint failed on  the Android x64 bot due to the patch in #10 https://uberchromegw.corp.google.com/i/chromium.android/builders/Android%20x64%20Builder%20%28dbg%29/builds/26140


Lint found 2 errors
chrome/android/java/res/values-v17/styles.xml:62 The resource `R.style.VrSupportTheme` appears to be unused: UnusedResources [warning]
    <style name="VrSupportTheme" parent="MainTheme">
           ~~~~~~~~~~~~~~~~~~~~~
chrome/android/java/res/values-v17/styles.xml:72 The resource `R.style.VrSupportThemeLauncher` appears to be unused: UnusedResources [warning]
    <style name="VrSupportThemeLauncher" parent="@android:style/Theme.NoDisplay">
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lint found 2 new issues.


I have a CL in the CQ [i]  to add specific suppression for the 2 VR themes. They are used in AndroidManifest.xml, but only when vr is enabled.


[i] https://chromium-review.googlesource.com/c/chromium/src/+/898410

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ef5cd4e831c21078301be64db6906ac2878651a5

commit ef5cd4e831c21078301be64db6906ac2878651a5
Author: Theresa <twellington@chromium.org>
Date: Fri Feb 02 01:19:21 2018

Add lint suppression for conditionally used VR theme

Compilation on some bots started failing due to the removal of a broad
lint suppression for values-v17/styles.xml. This CL adds back lint
suppression for a conditionally used VR theme.

BUG= 806060 
TBR=wnwen@chromium.org

Change-Id: I7756f07f35c272937a9fbbeae22500d0f73944a6
Reviewed-on: https://chromium-review.googlesource.com/898410
Commit-Queue: Theresa <twellington@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533891}
[modify] https://crrev.com/ef5cd4e831c21078301be64db6906ac2878651a5/build/android/lint/suppressions.xml

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/243103908664fc4cb53f96307ea38ecd193c24fb

commit 243103908664fc4cb53f96307ea38ecd193c24fb
Author: Andrew Grieve <agrieve@chromium.org>
Date: Tue Feb 06 05:44:49 2018

Android: Move VR-specific styles into res_vr/

This allows removing the android lint suppression for them.

Bug:  806060 
Change-Id: Ibdfd421f4a1714c64fecb0f2c1349a7af033ef91
Reviewed-on: https://chromium-review.googlesource.com/900047
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534639}
[modify] https://crrev.com/243103908664fc4cb53f96307ea38ecd193c24fb/build/android/lint/suppressions.xml
[modify] https://crrev.com/243103908664fc4cb53f96307ea38ecd193c24fb/chrome/android/java/res/values-v17/styles.xml
[add] https://crrev.com/243103908664fc4cb53f96307ea38ecd193c24fb/chrome/android/java/res_vr/values-v17/vr_styles.xml