Whiltelist the remoting viewer for the Chromoting extension

chrome/browser/content_settings/content_settings_internal_extension_provider.h

Index: chrome/browser/content_settings/content_settings_internal_extension_provider.h
diff --git a/chrome/browser/content_settings/content_settings_internal_extension_provider.h b/chrome/browser/content_settings/content_settings_internal_extension_provider.h
index 2fcb498258ba24d5ecd1ed70cba820ea7f50ea6e..dbcd0e36b803f09dbcd6fa4401bc402c8caf5dc7 100644
--- a/chrome/browser/content_settings/content_settings_internal_extension_provider.h
+++ b/chrome/browser/content_settings/content_settings_internal_extension_provider.h
@@ -5,6 +5,9 @@
 #ifndef CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_INTERNAL_EXTENSION_PROVIDER_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_INTERNAL_EXTENSION_PROVIDER_H_
 
+#include <set>
+#include <string>
+
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "components/content_settings/core/browser/content_settings_observable_provider.h"
@@ -63,6 +66,9 @@ class InternalExtensionProvider : public ObservableProvider,
   mutable base::Lock lock_;
   scoped_ptr<content::NotificationRegistrar> registrar_;
 
+  // Extension IDs used by the Chrome Remote Desktop app.
+  std::set<std::string> chrome_remote_desktop_;
+
   DISALLOW_COPY_AND_ASSIGN(InternalExtensionProvider);
 };