Add is_tracing to browser.

Add is_tracing_running to browser. 
Add is_timeline_recording_running to web_contents.
Add is_video_capture_running to tab.

BUG=348271
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=255559

[nduca, 2014-03-05 23:42:15]

can you add unit test coverage?

[nednguyen, 2014-03-06 01:08:02]

On 2014/03/05 23:42:15, nduca wrote:
> can you add unit test coverage?

Done

[nduca, 2014-03-06 22:39:04]

lgtm

https://codereview.chromium.org/176863005/diff/140001/tools/telemetry/telemet...
File tools/telemetry/telemetry/core/browser_unittest.py (right):

https://codereview.chromium.org/176863005/diff/140001/tools/telemetry/telemet...
tools/telemetry/telemetry/core/browser_unittest.py:175: b = self.CreateBrowser()
this test should return early if not b.supports_tracing

[nednguyen, 2014-03-06 23:42:16]

The CQ bit was checked by nednguyen@google.com

[commit-bot: I haz the power, 2014-03-06 23:44:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nednguyen@google.com/176863005/160001

[commit-bot: I haz the power, 2014-03-06 23:44:55]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-03-06 23:44:55]

Failed to apply patch for
tools/telemetry/telemetry/core/backends/chrome/inspector_backend.py:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file
tools/telemetry/telemetry/core/backends/chrome/inspector_backend.py
  Hunk #1 FAILED at 193.
  1 out of 1 hunk FAILED -- saving rejects to file
tools/telemetry/telemetry/core/backends/chrome/inspector_backend.py.rej

Patch:       tools/telemetry/telemetry/core/backends/chrome/inspector_backend.py
Index: tools/telemetry/telemetry/core/backends/chrome/inspector_backend.py
diff --git a/tools/telemetry/telemetry/core/backends/chrome/inspector_backend.py
b/tools/telemetry/telemetry/core/backends/chrome/inspector_backend.py
index
d24af66e0aa14bb53095c3f0c43e2189c71bb2f8..4db9f023a72301c70caa04d63ff3f352b5953188
100644
--- a/tools/telemetry/telemetry/core/backends/chrome/inspector_backend.py
+++ b/tools/telemetry/telemetry/core/backends/chrome/inspector_backend.py
@@ -193,6 +193,10 @@ class InspectorBackend(object):
   def timeline_model(self):
     return self._timeline.timeline_model
 
+  @property
+  def is_timeline_recording_running(self):
+    return self._timeline.is_timeline_recording_running
+
   def StartTimelineRecording(self):
     self._timeline.Start()

[nednguyen, 2014-03-06 23:53:49]

The CQ bit was checked by nednguyen@google.com

[commit-bot: I haz the power, 2014-03-06 23:57:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nednguyen@google.com/176863005/180001

[commit-bot: I haz the power, 2014-03-07 02:18:53]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-03-07 02:18:54]

Try jobs failed on following builders: mac_chromium_rel

[nednguyen, 2014-03-07 04:10:05]

The CQ bit was checked by nednguyen@google.com

[commit-bot: I haz the power, 2014-03-07 04:13:56]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nednguyen@google.com/176863005/180001

[commit-bot: I haz the power, 2014-03-07 09:05:48]

Change committed as 255559