Add ELIDE_AT_BEGINNING to views::Label

BUG=NONE

Review URL: https://codereview.chromium.org/177843007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253354 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253354
[App Shell] Fix a crash issue while closing root window with remote dev-tool connected.

No need to stop dev-tools explicitly before destroying webview widget in root window.
Since the dev-tools will be stopped while destroying webview.

BUG=345588
TEST=Follow steps as the CL says, and no crash.

Review URL: https://codereview.chromium.org/174783004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253355 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253355
Move fling_animator_impl_android.* to content/child/

BUG=338338

Review URL: https://codereview.chromium.org/152133010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253356 0039d316-1c4b-4281-b951-d872f2087c98
Mark a couple of WebRTC histograms no longer present in the code as obsolete.

BUG=none

Review URL: https://codereview.chromium.org/178363006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253357 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253357