Enable OrientationEvent only for android.

BUG=181136, 331337

Review URL: https://codereview.chromium.org/131913003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245210 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245210
Implement TracingController::GetMonitoringStatus

trace-viewer side CL is here: https://codereview.appspot.com/52710047

Currently the monitoring mode doesn't work correctly when we reload about:tracing. This is because reloaded about:tracing fails in extracting the current monitoring status (See my comment in patch set 2).

This CL implements TracingController::GetMonitoringStatus so that trace-viewer/src/about_tracing/profiling_view.js can get the current monitoring status when loading the profiling view.

TEST=content_browsertests::EnableCaptureAndDisableMonitoring
R=nduca@chromium.org

Review URL: https://codereview.chromium.org/139313005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245211 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245211