Hangouts doesn't use PDF AFAIK, so not https://crrev.com/379622.
Guessing https://crrev.com/379681 based upon "camera" in step 3 above.

https://crrev.com/379681 is about mic and camera permission settings in chrome://settings/content, it's not related to hangouts, and the change is applied to all platforms(including linux, mac and win).

My guess is https://crrev.com/379678, based on 'win' in the CL description and it changed font related file.

Most likely r379589, blink now requires the embedding layer to pass in the font rendering style instead of always assuming ClearType on windows.

The Flash plugin likely needs to be updated to call the following methods with the desired settings:
  blink::WebFontRendering::setAntialiasedTextEnabled
  blink::WebFontRendering::setLCDTextEnabled

Over to Flash team for further action.

I have fixed this issue to add font anti-aliasing settings at content::PpapiPluginMain.
I would like to contribute, can I upload a patch?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/90d6c375486700b6965665189853549c96716efa

commit 90d6c375486700b6965665189853549c96716efa
Author: msr.i386 <msr.i386@gmail.com>
Date: Fri Jun 10 03:28:45 2016

Set text anti-aliasing settings at PPAPI plugin process on Windows.

This patch will enable text anti-aliasing to call the following methods:
* blink::WebFontRendering::setAntialiasedTextEnabled
* blink::WebFontRendering::setLCDTextEnabled

This patch will also get anti-aliasing settings from
gfx::GetFontRenderParams method.

BUG= 615375 
TEST=If [Smooth edges of screen fonts] at advanced system settings is
enabled, text in flash is anti-aliased. If disabled, text is aliased.

Review-Url: https://codereview.chromium.org/2048563004
Cr-Commit-Position: refs/heads/master@{#399073}

[modify] https://crrev.com/90d6c375486700b6965665189853549c96716efa/AUTHORS
[modify] https://crrev.com/90d6c375486700b6965665189853549c96716efa/content/ppapi_plugin/ppapi_plugin_main.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/90d6c375486700b6965665189853549c96716efa

commit 90d6c375486700b6965665189853549c96716efa
Author: msr.i386 <msr.i386@gmail.com>
Date: Fri Jun 10 03:28:45 2016

Set text anti-aliasing settings at PPAPI plugin process on Windows.

This patch will enable text anti-aliasing to call the following methods:
* blink::WebFontRendering::setAntialiasedTextEnabled
* blink::WebFontRendering::setLCDTextEnabled

This patch will also get anti-aliasing settings from
gfx::GetFontRenderParams method.

BUG= 615375 
TEST=If [Smooth edges of screen fonts] at advanced system settings is
enabled, text in flash is anti-aliased. If disabled, text is aliased.

Review-Url: https://codereview.chromium.org/2048563004
Cr-Commit-Position: refs/heads/master@{#399073}

[modify] https://crrev.com/90d6c375486700b6965665189853549c96716efa/AUTHORS
[modify] https://crrev.com/90d6c375486700b6965665189853549c96716efa/content/ppapi_plugin/ppapi_plugin_main.cc

This is working fine on the latest canary(53.0.2770.0) on Windows-7. Attached is the screenshot of the same.

msr.i386@: Could you please get this merged to M-52.

Cc'ing reviewer's eae@ and piman@ as well for help in getting this merged to M-52.

Deleted: 615375.png 21.9 KB

	615375.png 21.9 KB View Download

 Issue 618112  has been merged into this issue.

Your change meets the bar and is auto-approved for M52 (branch: 2743)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1d08547fe8beada518f8659ee9867cddfa440c8a

commit 1d08547fe8beada518f8659ee9867cddfa440c8a
Author: Fredrik Söderquist <fs@opera.com>
Date: Mon Jun 20 08:46:47 2016

Set text anti-aliasing settings at PPAPI plugin process on Windows.

This patch will enable text anti-aliasing to call the following methods:
* blink::WebFontRendering::setAntialiasedTextEnabled
* blink::WebFontRendering::setLCDTextEnabled

This patch will also get anti-aliasing settings from
gfx::GetFontRenderParams method.

BUG= 615375 
TEST=If [Smooth edges of screen fonts] at advanced system settings is
enabled, text in flash is anti-aliased. If disabled, text is aliased.

Review-Url: https://codereview.chromium.org/2048563004
Cr-Commit-Position: refs/heads/master@{#399073}
(cherry picked from commit 90d6c375486700b6965665189853549c96716efa)

Review URL: https://codereview.chromium.org/2081643002 .

Cr-Commit-Position: refs/branch-heads/2743@{#393}
Cr-Branched-From: 2b3ae3b8090361f8af5a611712fc1a5ab2de53cb-refs/heads/master@{#394939}

[modify] https://crrev.com/1d08547fe8beada518f8659ee9867cddfa440c8a/AUTHORS
[modify] https://crrev.com/1d08547fe8beada518f8659ee9867cddfa440c8a/content/ppapi_plugin/ppapi_plugin_main.cc

Looks like the issue is still there on Windows 10 + 53.0.2770.0

Deleted: [H28.06.19] Chrome Canary 53 Google Hangout Font.png 35.0 KB

	[H28.06.19] Chrome Canary 53 Google Hangout Font.png 35.0 KB View Download

Confirm to be fixed on Canary. Hope to see it come to stable release soon.

Deleted: Chrome53.png 132 KB

	Chrome53.png 132 KB View Download

Maybe I was too quick to resolve.

It still looks like ass. They need to add back GDI rendering.

Deleted: chromesucks.png 39.9 KB

	chromesucks.png 39.9 KB View Download

Tested the issue on Windows 7 using 52.0.2743.49.Observed that font of text displayed properly after clicking on 'web camera' option.
Please find attached screenshot.

Marking it as TE-Verified-M52.

Deleted: 615375.png 22.6 KB

	615375.png 22.6 KB View Download

 Issue 615949  has been merged into this issue.

@ssamanoori could you please also verify on Windows 10 ? I see reports that the issue still reproduces on Windows 10 + M53 Canary ( see comment #15). It could be a regression on M53 but would be good to make sure Windows 10 works as well.  

Able to reproduce the issue on Windows 10 using 52.0.2743.82, 53.0.2785.30, canary 54.0.2810.0.Observed that font of text is not displayed properly after clicking on 'web camera' option.

Please find attached screenshot.

adharap@: Could you please check the issue on Windows 10 and provide bisect information?

Deleted: 615375.png 124 KB

	615375.png 124 KB View Download

I have a different observation than @ssamanoori : i'm not able to reproduce it on Windows 10 since Chrome 52 (52.0.2743.82 m 64bits).

This issue should be fixed by now. adharap@ Are you still able to reproduce?

I found that text antialiasing doesn't work when Win32k lockdown enabled.

Deleted: win32klockdown.png 12.1 KB

	win32klockdown.png 12.1 KB View Download

Re 25: It doesn't appear to work for plugins but for all other content (I.e. the tab strip at the top of the camera window in the screenshot and the buttons below).

I'm going to fiddle with this; the code that was added recently can't work during lockdown because it's trying to call SystemParametersInfo().

I noticed this because I was trying to fix crbug.com/258201 which will prevent HWNDs from being created in random processes and non-UI threads. At the moment this happens in the call to GetFontRenderParams(), as it tries to create a window to listen for changes to the settings, which also won't work.

I think I'll probably just pass the two values we need in on the ppapi command line. They won't update when the user switches the Windows-level setting until they reload the page, but it'll be better than what we have now at least.

DPI scale also won't be working per this: https://cs.chromium.org/chromium/src/content/ppapi_plugin/ppapi_plugin_main.cc?rcl=0&l=136

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e66b57781d08e764d749b5440c7e940bb3fc3700

commit e66b57781d08e764d749b5440c7e940bb3fc3700
Author: scottmg <scottmg@chromium.org>
Date: Tue Sep 06 20:30:43 2016

Fix antialiasing ppapi settings, browser_tests in win32k lockdown

PpapiPluginMain was calling font and dpi retrieval functions which
don't work in lockdown. Pass those values on the command line instead.

BUG=258201, 615375 

Review-Url: https://codereview.chromium.org/2306193002
Cr-Commit-Position: refs/heads/master@{#416704}

[modify] https://crrev.com/e66b57781d08e764d749b5440c7e940bb3fc3700/content/browser/ppapi_plugin_process_host.cc
[modify] https://crrev.com/e66b57781d08e764d749b5440c7e940bb3fc3700/content/ppapi_plugin/ppapi_plugin_main.cc
[modify] https://crrev.com/e66b57781d08e764d749b5440c7e940bb3fc3700/content/public/common/content_switches.cc
[modify] https://crrev.com/e66b57781d08e764d749b5440c7e940bb3fc3700/content/public/common/content_switches.h

I believe this should be fixed now, please confirm if possible.

I still have the issue with Windows 10 + Chrome 54.0.2840.71

Just tested this and another similar Flash-based issue in Windows 10 Chrome Version 54.0.2840.99 m, where it was not working and then onto trying it in Canary Version 57.0.2926.0 where both issues were fixed. Finally flash applications look normal again :) Thanks!