Permissions: glue between Mojo and Blink for permission observing.

content/child/permissions/permission_dispatcher_thread_proxy.h

Index: content/child/permissions/permission_dispatcher_thread_proxy.h
diff --git a/content/child/permissions/permission_dispatcher_thread_proxy.h b/content/child/permissions/permission_dispatcher_thread_proxy.h
index c5273355000bf6d3f271ecf1ece5e8e5f03ad608..037e5483866d2d58ce8f6d68533cca7287a9cbd7 100644
--- a/content/child/permissions/permission_dispatcher_thread_proxy.h
+++ b/content/child/permissions/permission_dispatcher_thread_proxy.h
@@ -5,10 +5,10 @@
 #ifndef CONTENT_CHILD_PERMISSIONS_PERMISSION_DISPATCHER_THREAD_PROXY_H_
 #define CONTENT_CHILD_PERMISSIONS_PERMISSION_DISPATCHER_THREAD_PROXY_H_
 
-#include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "content/child/permissions/permission_observers_registry.h"
 #include "content/child/worker_task_runner.h"
 #include "third_party/WebKit/public/platform/modules/permissions/WebPermissionClient.h"
 
@@ -22,6 +22,7 @@ class PermissionDispatcher;
 
 class PermissionDispatcherThreadProxy :

[whywhat, 2015/04/02 16:20:24]

The class name has the word Thread in it, indicating a potential multithreading
danger. Yet, there's no description of the class.

[mlamouri (slow - plz ping), 2015/04/02 17:02:43]

Done.

     public blink::WebPermissionClient,
+    public PermissionObserversRegistry,
     public WorkerTaskRunner::Observer {
  public:
   static PermissionDispatcherThreadProxy* GetThreadInstance(
@@ -32,6 +33,10 @@ class PermissionDispatcherThreadProxy :
   virtual void queryPermission(blink::WebPermissionType type,
                                const blink::WebURL& origin,
                                blink::WebPermissionQueryCallback* callback);
+  virtual void startListening(blink::WebPermissionType type,
+                              const blink::WebURL& origin,
+                              blink::WebPermissionObserver* observer);
+  virtual void stopListening(blink::WebPermissionObserver* observer);
 
   // WorkerTaskRunner::Observer implementation.
   void OnWorkerRunLoopStopped() override;
@@ -41,6 +46,12 @@ class PermissionDispatcherThreadProxy :
       base::SingleThreadTaskRunner* main_thread_task_runner,
       PermissionDispatcher* permissions_dispatcher);
 
+  // Callback when an observed permission changes.
+  void OnPermissionChanged(blink::WebPermissionType type,
+                           const std::string& origin,
+                           blink::WebPermissionObserver* observer,
+                           blink::WebPermissionStatus status);
+
   virtual ~PermissionDispatcherThreadProxy();
 
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;