Let Flash join and be controlled by media session

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 337b815b7122c9bb7962efe212ccbdf768c2ce53..3852cc5e2135676210c63ac66cfa8c6fdc6574e4 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -1192,11 +1192,13 @@ IPC_SYNC_MESSAGE_CONTROL3_1(FrameHostMsg_Are3DAPIsBlocked,
 #if defined(ENABLE_PLUGINS)
 // Notification sent from a renderer to the browser that a Pepper plugin
 // instance is created in the DOM.
-IPC_MESSAGE_ROUTED0(FrameHostMsg_PepperInstanceCreated)
+IPC_MESSAGE_ROUTED1(FrameHostMsg_PepperInstanceCreated,
+                    int32_t /* pp_instance */)
 
 // Notification sent from a renderer to the browser that a Pepper plugin
 // instance is deleted from the DOM.
-IPC_MESSAGE_ROUTED0(FrameHostMsg_PepperInstanceDeleted)
+IPC_MESSAGE_ROUTED1(FrameHostMsg_PepperInstanceDeleted,
+                    int32_t /* pp_instance */)
 
 // Sent to the browser when the renderer detects it is blocked on a pepper
 // plugin message for too long. This is also sent when it becomes unhung
@@ -1216,6 +1218,16 @@ IPC_MESSAGE_ROUTED2(FrameHostMsg_PluginCrashed,
                     base::FilePath /* plugin_path */,
                     base::ProcessId /* plugin_pid */)
 
+// Notification sent from a renderer to the browser that a Pepper plugin
+// instance has started playback.
+IPC_MESSAGE_ROUTED1(FrameHostMsg_PepperStartsPlayback,
+                    int32_t /* pp_instance */)
+
+// Notification sent from a renderer to the browser that a Pepper plugin
+// instance has stopped playback.
+IPC_MESSAGE_ROUTED1(FrameHostMsg_PepperStopsPlayback,
+                    int32_t /* pp_instance */)
+
 // Used to get the list of plugins
 IPC_SYNC_MESSAGE_CONTROL1_1(FrameHostMsg_GetPlugins,
     bool /* refresh*/,