Tab audio mute control (views UI), behind a switch (off by default).

tools/metrics/actions/actions.xml

Index: tools/metrics/actions/actions.xml
diff --git a/tools/metrics/actions/actions.xml b/tools/metrics/actions/actions.xml
index 9caf9c514ecf160d429a0296214334aac7fd1ae9..fc298f967b91043533b40107780b846c36a3704f 100644
--- a/tools/metrics/actions/actions.xml
+++ b/tools/metrics/actions/actions.xml
@@ -2043,6 +2043,13 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="CloseTab_MediaIndicatorShowing">
+  <owner>miu@chromium.org</owner>
+  <description>
+    User clicked the close tab button while the tab media indicator was showing.
+  </description>
+</action>
+
 <action name="CloseTab_Mouse">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
@@ -7072,6 +7079,13 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="MediaIndicatorButton_Dragged">
+  <owner>miu@chromium.org</owner>
+  <description>
+    User dragged the tab media indicator button; perhaps meant to drag the tab.
+  </description>
+</action>
+
 <action name="Menu_Take_Screenshot">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
@@ -7867,6 +7881,13 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="MuteTab">
+  <owner>miu@chromium.org</owner>
+  <description>
+    User clicked the tab audio indicator to mute the tab.
+  </description>
+</action>
+
 <action name="NTPPromoClosed">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
@@ -10818,6 +10839,13 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="TabContextMenu_MuteTabs">
+  <owner>miu@chromium.org</owner>
+  <description>
+    User muted one or more tabs via the tab context menu.
+  </description>
+</action>
+
 <action name="TabContextMenu_NewTab">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
@@ -10848,6 +10876,13 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="TabContextMenu_UnmuteTabs">
+  <owner>miu@chromium.org</owner>
+  <description>
+    User unmuted one or more tabs via the tab context menu.
+  </description>
+</action>
+
 <action name="TabContextMenu_UseDestinationsTab_Off">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
@@ -10863,6 +10898,13 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="TabMediaIndicator_Clicked">
+  <owner>miu@chromium.org</owner>
+  <description>
+    User clicked the tab media indicator, but this will have no effect.

[Mark P, 2014/09/23 17:30:49]

nit:
, but
->
;

[miu, 2014/09/23 18:27:58]

Done.

+  </description>
+</action>
+
 <action name="TabOverview_DetachCell">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
@@ -11068,6 +11110,13 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="UnmuteTab">
+  <owner>miu@chromium.org</owner>
+  <description>
+    User clicked the tab audio muting indicator to unmute the tab.
+  </description>
+</action>
+
 <action name="Unselect">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>