Use total page scale in the LayerScrollOffsetDelegate.

In order for the LayerScrollOffsetDelegate to see the most up to
date pageScale we need to use the total page scale rather than
just the value that was last synced with the main thread.

BUG=None
TEST=cc_unittests
R=aelias@chromium.org, joth@chromium.org, yfriedman@chromium.org

Review URL: https://codereview.chromium.org/26274003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227763 0039d316-1c4b-4281-b951-d872f2087c98
Update PPAPI Simple version of Earth demo to support touch.
BUG=none
TEST=manually tested on chromeos pixel
R=binji@chromium.org

Review URL: https://codereview.chromium.org/26321005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227764 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227764