Fix some UMA warnings across chromium.

Some BrowserPlugin and WebView related UMAs were not updated.
Indent some UserMetricsAction() constructor to specify the UMA name to
appear on the same line so there are no warnings, note that this also
lead to shortening some string to fit in 80 chars but should not be an
issue.

BUG=317084
Test=None

Review URL: https://codereview.chromium.org/77673002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236312 0039d316-1c4b-4281-b951-d872f2087c98
Use gfx::Size in BitmapImage interface.

BUG=318373

Review URL: https://codereview.chromium.org/77893002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236313 0039d316-1c4b-4281-b951-d872f2087c98
Add a GinEmbedder enum and use it to identify WrapperInfo

BUG=317398
R=dcarney@chromium.org,abarth@chromium.org

Review URL: https://codereview.chromium.org/77913004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236314 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236314