[#7] Pass gfx::Size by const ref.

Any struct of size > 4 bytes should be passed by const ref. 
Passing by ref for these structs is faster than passing by value,
especially when invoking function has multiple parameters and some
other scenarios mentioned in the bug.

BUG=159273

Review URL: https://codereview.chromium.org/145313006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247426 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247426
Telemetry: Set browser process name on Android.

BUG=321056,317481

Review URL: https://codereview.chromium.org/103533002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247427 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247427