I wanted to upload the current WebMessage CLs for review:

https://chromium-review.googlesource.com/c/chromium/src/+/976125
ag/3978617

if you could get a CL up for this today that'd be awesome :)
(so we can land that CL/CLs before the webmessage stuff).

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/585c3f72947e4976c94d92abf347739d9358c8e3

commit 585c3f72947e4976c94d92abf347739d9358c8e3
Author: Nate Fischer <ntfschr@chromium.org>
Date: Mon Apr 30 23:24:01 2018

AW: convert between frameworks and support lib SafeBrowsingResponses

This adds conversion code to convert between the frameworks and Support
Library versions of SafeBrowsingResponse.

No change to behavior otherwise.

Bug:  837815 
Test: ./gradlew :webkit:connectedAndroidTest
Change-Id: Id152ff18ad4d3b6cbd682ba90add1e02eb64a559
Reviewed-on: https://chromium-review.googlesource.com/1035908
Reviewed-by: Gustav Sennton <gsennton@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Commit-Queue: Nate Fischer <ntfschr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#554918}
[modify] https://crrev.com/585c3f72947e4976c94d92abf347739d9358c8e3/android_webview/glue/BUILD.gn
[add] https://crrev.com/585c3f72947e4976c94d92abf347739d9358c8e3/android_webview/glue/java/src/com/android/webview/chromium/SafeBrowsingResponseAdapter.java
[modify] https://crrev.com/585c3f72947e4976c94d92abf347739d9358c8e3/android_webview/glue/java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java
[modify] https://crrev.com/585c3f72947e4976c94d92abf347739d9358c8e3/android_webview/glue/java/src/com/android/webview/chromium/WebkitToSharedGlueConverter.java
[modify] https://crrev.com/585c3f72947e4976c94d92abf347739d9358c8e3/android_webview/support_library/boundary_interfaces/src/org/chromium/support_lib_boundary/WebkitToCompatConverterBoundaryInterface.java
[modify] https://crrev.com/585c3f72947e4976c94d92abf347739d9358c8e3/android_webview/support_library/callback/BUILD.gn
[add] https://crrev.com/585c3f72947e4976c94d92abf347739d9358c8e3/android_webview/support_library/callback/java/src/org/chromium/support_lib_callback_glue/SupportLibSafeBrowsingResponse.java
[modify] https://crrev.com/585c3f72947e4976c94d92abf347739d9358c8e3/android_webview/support_library/callback/java/src/org/chromium/support_lib_callback_glue/SupportLibWebViewContentsClientAdapter.java
[modify] https://crrev.com/585c3f72947e4976c94d92abf347739d9358c8e3/android_webview/support_library/java/src/org/chromium/support_lib_glue/SupportLibWebkitToCompatConverterAdapter.java

Requesting a merge, so that this can be in the first release which supports the support library. This is pretty low-risk in that it only affects support library, no expected impact on the rest of webview.

The bug is marked as P3 or Feature. It should not be merged as M67 is in beta. 
Please contact the approriate milestone owner if you have questions.
Owners: cmasso@(Android), cmasso@(iOS), kbleicher@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Sorry, I had the wrong priority. P1 is more appropriate for this.

This bug requires manual review: M67 has already been promoted to the beta branch, so this requires manual review
Please contact the milestone owner if you have questions.
Owners: cmasso@(Android), cmasso@(iOS), kbleicher@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

+cmasso@ to make sure this is on your radar

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8

commit 1c64ff270cbf48d7f35659b92fc9b03564ca0cd8
Author: Nate Fischer <ntfschr@chromium.org>
Date: Fri May 04 20:02:04 2018

AW: convert between frameworks and support lib SafeBrowsingResponses

This adds conversion code to convert between the frameworks and Support
Library versions of SafeBrowsingResponse.

No change to behavior otherwise.

Bug:  837815 
Test: ./gradlew :webkit:connectedAndroidTest
Change-Id: Id152ff18ad4d3b6cbd682ba90add1e02eb64a559
Reviewed-on: https://chromium-review.googlesource.com/1035908
Reviewed-by: Gustav Sennton <gsennton@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Commit-Queue: Nate Fischer <ntfschr@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#554918}(cherry picked from commit 585c3f72947e4976c94d92abf347739d9358c8e3)
Reviewed-on: https://chromium-review.googlesource.com/1044587
Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Cr-Commit-Position: refs/branch-heads/3396@{#487}
Cr-Branched-From: 9ef2aa869bc7bc0c089e255d698cca6e47d6b038-refs/heads/master@{#550428}
[modify] https://crrev.com/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8/android_webview/glue/BUILD.gn
[add] https://crrev.com/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8/android_webview/glue/java/src/com/android/webview/chromium/SafeBrowsingResponseAdapter.java
[modify] https://crrev.com/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8/android_webview/glue/java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java
[modify] https://crrev.com/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8/android_webview/glue/java/src/com/android/webview/chromium/WebkitToSharedGlueConverter.java
[modify] https://crrev.com/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8/android_webview/support_library/boundary_interfaces/src/org/chromium/support_lib_boundary/WebkitToCompatConverterBoundaryInterface.java
[modify] https://crrev.com/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8/android_webview/support_library/callback/BUILD.gn
[add] https://crrev.com/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8/android_webview/support_library/callback/java/src/org/chromium/support_lib_callback_glue/SupportLibSafeBrowsingResponse.java
[modify] https://crrev.com/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8/android_webview/support_library/callback/java/src/org/chromium/support_lib_callback_glue/SupportLibWebViewContentsClientAdapter.java
[modify] https://crrev.com/1c64ff270cbf48d7f35659b92fc9b03564ca0cd8/android_webview/support_library/java/src/org/chromium/support_lib_glue/SupportLibWebkitToCompatConverterAdapter.java