Add preview user actions to xml file.

BUG=371881

Review URL: https://codereview.chromium.org/273123002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269649 0039d316-1c4b-4281-b951-d872f2087c98

tools/metrics/actions/actions.xml

@@ -7382,6 +7382,26 @@ 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="MobilePreviewPageBack">
+  <owner>ksimbili@chromium.org</owner>
+  <description>
+    When user navigates back, using either system back or toolbar back button,
+    from the preview page.
+  </description>
+</action>
+
+<action name="MobilePreviewPageReload">
+  <owner>ksimbili@chromium.org</owner>
+  <description>
+    User pressed reload button while the preview page is being shown.
+  </description>
+</action>
+
+<action name="MobilePreviewPageTabClose">
+  <owner>ksimbili@chromium.org</owner>
+  <description>User closes the tab while preview page is loaded.</description>
+</action>
+
 <action name="MobileReceivedExternalIntent">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>