Content Settings: Add RevocationObserver to measure when permissions are revoked

chrome/browser/content_settings/content_settings_mock_observer.h

Index: chrome/browser/content_settings/content_settings_mock_observer.h
diff --git a/chrome/browser/content_settings/content_settings_mock_observer.h b/chrome/browser/content_settings/content_settings_mock_observer.h
index 0d9989f2b259ead1331e994b6a0753cd507e0eb0..5b5d6a2f971e402fe93b8dac5169f1d7639ea187 100644
--- a/chrome/browser/content_settings/content_settings_mock_observer.h
+++ b/chrome/browser/content_settings/content_settings_mock_observer.h
@@ -10,10 +10,12 @@
 #include "base/macros.h"
 #include "components/content_settings/core/browser/content_settings_observer.h"
 #include "testing/gmock/include/gmock/gmock.h"
+#include "url/gurl.h"
 
 namespace content_settings {
 
-class MockObserver : public Observer {
+class MockObserver : public Observer,
+                     public RevocationObserver {
  public:
   MockObserver();
   virtual ~MockObserver();
@@ -23,6 +25,13 @@ class MockObserver : public Observer {
                     const ContentSettingsPattern& secondary_pattern,
                     ContentSettingsType content_type,
                     std::string resource_identifier));
+
+  MOCK_METHOD4(OnContentSettingRevoked,
+               void(const GURL&,
+                    const GURL&,
+                    ContentSettingsType,
+                    std::string));
+
  private:
   DISALLOW_COPY_AND_ASSIGN(MockObserver);
 };