Add UMA for <webview> APIs: a. ClearData, b. when Permission request is allowed.

content/browser/browser_plugin/browser_plugin_guest.h

Index: content/browser/browser_plugin/browser_plugin_guest.h
diff --git a/content/browser/browser_plugin/browser_plugin_guest.h b/content/browser/browser_plugin/browser_plugin_guest.h
index 9ccf861498b7c8b163bca8d3e201502a4defd319..110c38b02d8846b20ca600b911dafbf19eae5375 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.h
+++ b/content/browser/browser_plugin/browser_plugin_guest.h
@@ -295,7 +295,8 @@ class CONTENT_EXPORT BrowserPluginGuest
 
   void RespondToPermissionRequest(int request_id,
                                   bool should_allow,
-                                  const std::string& user_input);
+                                  const std::string& user_input,
+                                  bool user_initiated);
 
  private:
   class EmbedderWebContentsObserver;