[Android WebView] Disable testSetInitialScale

The test is failing on android_dbg_triggered_test and blocking cq. But
seem to be passing on main waterfall bots.

BUG=304548
TBR=mnaganov@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/26144002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227207 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227207
[Android WebView] Disable testMediaPlaybackWithoutUserGesture

The test is failing on android_dbg_triggered_test bot, blocking cq.
However it is still passing on main waterfall for some reason.

BUG=304549
TBR=michaelbai@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/26145002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227208 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227208