The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0df82202a267058499e2420cd8ef7c74899092c1

commit 0df82202a267058499e2420cd8ef7c74899092c1
Author: khmel <khmel@google.com>
Date: Fri Jun 23 03:15:42 2017

Fix uninstall extension dialog has different icon.

This CL sync icon used for extension dialog with default one used to
represent extension based app.
This additionally fixes following issues:
  - base class for uninstall dialog and implementation has own
  expectations for icon size. Now use only one source to define icon
  size.
  - Provide correct loading of icons for non-standard device scale
  factors.

For mechanical change in extension_uninstall_dialog_cocoa.mm
TBR=ellyjones@chromium.org

      desktop.

Bug:  730853 
Test: Manually on Cave (1.25 scale factor), Linux Chrome OS + Linux
Change-Id: Ib3d1c80d6883a079728b917efc726e9458b6bacb
Reviewed-on: https://chromium-review.googlesource.com/527527
Commit-Queue: Yury Khmel <khmel@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#481802}
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/chrome/browser/extensions/chrome_app_icon.cc
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/chrome/browser/extensions/chrome_app_icon_service.cc
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/chrome/browser/extensions/chrome_app_icon_service.h
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/chrome/browser/extensions/extension_uninstall_dialog.cc
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/chrome/browser/extensions/extension_uninstall_dialog.h
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/chrome/browser/ui/cocoa/extensions/extension_uninstall_dialog_cocoa.mm
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/chrome/browser/ui/views/extensions/extension_uninstall_dialog_view.cc
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/extensions/browser/extension_icon_image.cc
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/extensions/browser/extension_icon_image.h
[modify] https://crrev.com/0df82202a267058499e2420cd8ef7c74899092c1/extensions/browser/extension_icon_image_unittest.cc