[Android WebView] Try to enable AwSettingsTest#testAppCacheWithTwoViews

It's been long time since the test has been disabled. We have changed
a lot of things, so perhaps we can give it a try.

BUG=171765
TBR=boliu@chromium.org

Review URL: https://codereview.chromium.org/95043002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237791 0039d316-1c4b-4281-b951-d872f2087c98
[Android WebView] Fix AwZoomTest tests

The following tests were broken long ago during compositor evolution:

  AwZoomTest#testMagnification
  AwZoomTest#testMagnificationWithZoomSupportOff
  AwZoomTest#testZoomControls

Updated them to pass with the current code.

BUG=239144
R=mkosiba@chromium.org

Review URL: https://codereview.chromium.org/94993002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237792 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237791
SVN changes up to revision 237792