CL: https://codereview.chromium.org/2082893003 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9373922b7d01101f232c6ccfdedefd76e338e3ab

commit 9373922b7d01101f232c6ccfdedefd76e338e3ab
Author: oshima <oshima@chromium.org>
Date: Tue Jun 21 17:24:58 2016

Scale menu position back to viewport in pepper plugin

pepper uses DIP, so it needs to be converted to viewport in use-zoom-for-dsf mode.

BUG= 621943 ,485650
TEST=manual

Review-Url: https://codereview.chromium.org/2082893003
Cr-Commit-Position: refs/heads/master@{#401024}

[modify] https://crrev.com/9373922b7d01101f232c6ccfdedefd76e338e3ab/content/renderer/pepper/pepper_plugin_instance_impl.cc
[modify] https://crrev.com/9373922b7d01101f232c6ccfdedefd76e338e3ab/content/renderer/pepper/renderer_ppapi_host_impl.cc
[modify] https://crrev.com/9373922b7d01101f232c6ccfdedefd76e338e3ab/content/renderer/pepper/renderer_ppapi_host_impl.h

Can we merge to 52? This is chromeos specific in 52, and pretty safe change.

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/+/8943b97229c51f6ef0e1eb036089e9b68eff5cf7

commit 8943b97229c51f6ef0e1eb036089e9b68eff5cf7
Author: Mitsuru Oshima <oshima@chromium.org>
Date: Thu Jun 23 20:46:11 2016

Scale menu position back to viewport in pepper plugin

pepper uses DIP, so it needs to be converted to viewport in use-zoom-for-dsf mode.

BUG= 621943 ,485650
TEST=manual

Review-Url: https://codereview.chromium.org/2082893003
Cr-Commit-Position: refs/heads/master@{#401024}
(cherry picked from commit 9373922b7d01101f232c6ccfdedefd76e338e3ab)

Review URL: https://codereview.chromium.org/2094843002 .

Cr-Commit-Position: refs/branch-heads/2743@{#459}
Cr-Branched-From: 2b3ae3b8090361f8af5a611712fc1a5ab2de53cb-refs/heads/master@{#394939}

[modify] https://crrev.com/8943b97229c51f6ef0e1eb036089e9b68eff5cf7/content/renderer/pepper/pepper_plugin_instance_impl.cc
[modify] https://crrev.com/8943b97229c51f6ef0e1eb036089e9b68eff5cf7/content/renderer/pepper/renderer_ppapi_host_impl.cc
[modify] https://crrev.com/8943b97229c51f6ef0e1eb036089e9b68eff5cf7/content/renderer/pepper/renderer_ppapi_host_impl.h

oshima@ - Could you please provide manual steps to test this issue, It will be helpful for chrome TE team to verify it.

Thanks!

On high DPI device like link, samus, open context menu on flash content.

Tested this issue on high DPI device Windows-10 using chrome latest Dev M53-53.0.2785.34.

oshima@ - Attaching screen-shot for reference, Could you please confirm is this is the expected behavior of the issue?

Deleted: FlashContextMenu.png 1.2 MB

	FlashContextMenu.png 1.2 MB View Download

If it opens at the cursor location (which I can't see in the screenshot :), then it's fixed.

As per comment #11 confirmed the issue got fixed on latest Dev M53, Hence adding TE-Verified label.