Support layout testing Web Notifications from Document and Worker contexts.

content/shell/renderer/test_runner/test_runner.h

Index: content/shell/renderer/test_runner/test_runner.h
diff --git a/content/shell/renderer/test_runner/test_runner.h b/content/shell/renderer/test_runner/test_runner.h
index 3c98c38d64bc50e5409cb3bd4800c10e225d0b57..eaae272a560110e4550a9f14a75084ca6fc4535c 100644
--- a/content/shell/renderer/test_runner/test_runner.h
+++ b/content/shell/renderer/test_runner/test_runner.h
@@ -15,6 +15,7 @@
 #include "content/shell/renderer/test_runner/web_test_runner.h"
 #include "v8/include/v8.h"
 
+class GURL;
 class SkBitmap;
 
 namespace blink {
@@ -518,8 +519,12 @@ class TestRunner : public WebTestRunner,
   void SetMIDISysexPermission(bool value);
 
   // Grants permission for desktop notifications to an origin
-  void GrantWebNotificationPermission(const std::string& origin,
+  void GrantWebNotificationPermission(const GURL& origin,
                                       bool permission_granted);
+
+  // Clears all previously granted Web Notification permissions.
+  void ClearWebNotificationPermissions();
+
   // Simulates a click on a desktop notification.
   bool SimulateWebNotificationClick(const std::string& value);