Add a histogram to measure the frequency of OCSP stapling support by servers

BUG=none
R=wtc

Review URL: https://codereview.chromium.org/171773006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252765 0039d316-1c4b-4281-b951-d872f2087c98
Extract Chrome-specific code from NativeAppWindowViews

* Extract Chrome code into ChromeNativeAppWindowViews
* Introduce apps/ui/views/native_app_window_view.h/cc
* Add stubs to NativeAppWindowViews so it can be used in tests and in
  app_shell.
* Move ShapedAppWindowTargeter to apps/ui/views

This is part 1 of 2 CLs to allow app_shell to create a NativeAppWindow
and show a Hello world app.

BUG=343174
TEST=existing browser_tests, specifically PlatformApp*

Review URL: https://codereview.chromium.org/171003004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252766 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252766
Automated Commit: Committing new LKGM version 5528.0.0 for chromeos.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252767 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252767