QUIC - changes to LOG statements found while merging the following
chromium CL into internal code.

  https://codereview.chromium.org/171693003/

R=rch@chromium.org

Review URL: https://codereview.chromium.org/168263005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252358 0039d316-1c4b-4281-b951-d872f2087c98
Remove checks for NULL WebContents in TranslateManager

BUG=332736

Review URL: https://codereview.chromium.org/171533015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252359 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252359
Expose activity from WindowAndroid.

Changes ActivityWindow to only keep a WeakReference to the Activity to
avoid it preventing an Activity from being GC'd.

BUG=341231

Review URL: https://codereview.chromium.org/171803002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252360 0039d316-1c4b-4281-b951-d872f2087c98
Updated histograms.xml to reflect recent metrics on Chrome OS.

BUG=chromium:341358
TEST=pretty_print and validate_format

Review URL: https://codereview.chromium.org/167583003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252361 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252361