<webview>: First stab at implementing media permission request for guests.

content/browser/browser_plugin/browser_plugin_embedder.cc

Index: content/browser/browser_plugin/browser_plugin_embedder.cc
diff --git a/content/browser/browser_plugin/browser_plugin_embedder.cc b/content/browser/browser_plugin/browser_plugin_embedder.cc
index 4ffaa3d7b383bdb45bb84d562e2a17ae8b070f4e..0c306499bd0011b9f61e9ee9cbb80c25e765f411 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder.cc
+++ b/content/browser/browser_plugin/browser_plugin_embedder.cc
@@ -250,6 +250,8 @@ bool BrowserPluginEmbedder::OnMessageReceived(const IPC::Message& message) {
                         OnPluginDestroyed)
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_BuffersSwappedACK,
                         OnSwapBuffersACK)
+    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_AllowMediaAccess,
+                        OnAllowMediaAccess)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -359,6 +361,14 @@ void BrowserPluginEmbedder::OnPluginDestroyed(int instance_id) {
   DestroyGuestByInstanceID(instance_id);
 }
 
+void BrowserPluginEmbedder::OnAllowMediaAccess(int instance_id,
+                                               int request_id,
+                                               bool should_allow) {
+  BrowserPluginGuest* guest = GetGuestByInstanceID(instance_id);

[Fady Samuel, 2013/02/05 17:53:27]

No need for this. Simply add BrowserPluginHostMsg_AllowMediaAccess to
ShouldForwardToBrowserPluginGuest, and it'll automagically do the forwarding for
you.

[lazyboy, 2013/02/07 04:38:42]

Yep, we also have embedder_web_contents_ directly in guest, which makes it work.
Done.

+  if (guest)
+    guest->AllowMediaAccess(web_contents(), request_id, should_allow);
+}
+
 void BrowserPluginEmbedder::OnSwapBuffersACK(int route_id,
                                              int gpu_host_id,
                                              const std::string& mailbox_name,