Add UMAs for video casting feature.

Added UMAs for:
1) How many times the button is shown
2) How many times the button is selected
3) How many times the YouTube button is selected
4) How many times a video is fullscreened
5) How many times a play ends in success or error
6) The % of a video that the user watched remotely


BUG=284482
NOTRY=true

Review URL: https://codereview.chromium.org/55193003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233301 0039d316-1c4b-4281-b951-d872f2087c98

tools/metrics/actions/chromeactions.txt

@@ -265,6 +265,10 @@
 0xea4788705e6873b4	Cancel
 0xb1c07c66ce4ae2ac	Caption_ClickTogglesMaximize
 0x96c3ac2d2a5d9dba	Caption_GestureTogglesMaximize
+0x13b9d3430f0ce5a7	Cast_Sender_CastDeviceSelected
+0xc8aef1b8545c6760	Cast_Sender_CastEnterFullscreen
+0x19a12dba54934c30	Cast_Sender_CastPlayRequested
+0x34878f681fad82d4	Cast_Sender_YouTubeDeviceSelected
 0x89394b102e55da81	ClearAuthenticationCache
 0x6bd5f5b094096aa7	ClearBrowsingData_Autofill
 0xae5b20986fb024db	ClearBrowsingData_Cache

tools/metrics/actions/extract_actions.py

@@ -199,6 +199,10 @@ def AddAndroidActions(actions):
   Arguments
     actions: set of actions to add to.
   """
+  actions.add('Cast_Sender_CastEnterFullscreen');
+  actions.add('Cast_Sender_CastDeviceSelected');
+  actions.add('Cast_Sender_YouTubeDeviceSelected');
+  actions.add('Cast_Sender_CastPlayRequested');
   actions.add('DataReductionProxy_PromoDisplayed');
   actions.add('DataReductionProxy_PromoLearnMore');
   actions.add('DataReductionProxy_TurnedOn');

tools/metrics/histograms/histograms.xml

@@ -1260,6 +1260,43 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="Cast.Sender.CastButtonShown" enum="BooleanEnabled">
+  <summary>
+    Records the number of times the cast button was shown to the user. The value
+    will be true if the button is enabled, and false if the button is disabled.
+    Note that depending on the current UX, it's possible that we hide the button
+    entirely if it's disabled, so it's possible for the false values to be 0.
+  </summary>
+</histogram>
+
+<histogram name="Cast.Sender.CastButtonShownInitialFullscreen"
+    enum="BooleanEnabled">
+  <summary>
+    Records the number of times the cast button was shown to the user when the
+    video is fullscreened. The value will only be recorded on entering
+    fullscreen. The value will be true if the button is enabled, and false if
+    the button is disabled. Note that depending on the current UX,it's possible
+    that we hide the button entirely if it's disabled, so it's possible for the
+    false values to be 0.
+  </summary>
+</histogram>
+
+<histogram name="Cast.Sender.CastPlaySuccess" enum="BooleanSuccess">
+  <summary>
+    Records the result of a request to play remotely. The value will be true if
+    the playback succeeded, and false if there was an error.
+  </summary>
+</histogram>
+
+<histogram name="Cast.Sender.CastTimeRemainingPercentage"
+    units="percent remaining">
+  <summary>
+    Records the percentage of the video left at the time the remote playback is
+    stopped. This will be recorded when the playback is stopped by the user, or
+    when it's stopped by the cast device.
+  </summary>
+</histogram>
+
 <histogram name="Cellular.ActivationFailure">
   <summary>
     The count of cellular device activation failures (Chrome OS).