GitLab

This CL consists of the following changes:
1) Remove function PowerOverlayEnabled() which is not used.
2) Remove function ExtensionsDisabled() which is not used.
3) Move ExtensionsDisabled(base::CommandLine) to chrome_extensions_browser_client.cc,
   which is the only call site.
4) Move chrome_switches.{h,cc} to lib "non_code_constants", as they don't contain any
   functions now.

After this change, including "chrome_switches.h" (and "chrome_constants.h")
only requires a dependence on lib "non_code_constants", rather than lib
"constants" which is overkill.

This applies to notification_helper which only includes "chrome_switches.h"
and "chrome_constants.h" under chrome/common.

Bug: 734095
Change-Id: I3be5ffff70e9f594989c2058dca0ef109eabf085
Reviewed-on: https://chromium-review.googlesource.com/930368Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Xi Cheng <chengx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538941}