Aura: Show dialog box asking user's permisssion for screen sharing for gtalk

ppapi/proxy/ppb_talk_private_proxy.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/proxy/ppb_talk_private_proxy.h"
 
 #include "ipc/ipc_message_macros.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_globals.h"
 #include "ppapi/proxy/plugin_proxy_delegate.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/shared_impl/tracked_callback.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_talk_private_api.h"
 
 namespace ppapi {
 namespace proxy {
 
 namespace {
 
 class Talk : public Resource, public thunk::PPB_Talk_Private_API {
  public:
-  Talk(PP_Instance instance) : Resource(OBJECT_IS_PROXY, instance) {
+  Talk(PP_Instance instance, int renderer_id)
+      : Resource(OBJECT_IS_PROXY, instance),
+        renderer_id_(renderer_id) {
   }
 
   // Resource overrides.
   thunk::PPB_Talk_Private_API* AsPPB_Talk_Private_API() { return this; }
 
   // PPB_Talk_API implementation.
   int32_t GetPermission(const PP_CompletionCallback& callback) {
     if (TrackedCallback::IsPending(callback_))
       return PP_ERROR_INPROGRESS;
     PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(
         pp_instance());
     if (!dispatcher)
       return PP_ERROR_FAILED;
 
     callback_ = new TrackedCallback(this, callback);
 
-    PluginGlobals::Get()->plugin_proxy_delegate()->SendToBrowser(
+    if (PluginGlobals::Get()->plugin_proxy_delegate()->SendToBrowser(
         new PpapiHostMsg_PPBTalk_GetPermission(
             API_ID_PPB_TALK,
             dispatcher->plugin_dispatcher_id(),
-            pp_resource()));
-    return PP_OK_COMPLETIONPENDING;
+            pp_resource(),
+            renderer_id_)))
+      return PP_OK_COMPLETIONPENDING;
+    return PP_ERROR_FAILED;
+  }
+
+  int GetRendererId() {
+    // Plugin side does not implement this method.
+    NOTREACHED();
+    return 0;
   }
 
   void GotCompletion(int32_t result) {
     TrackedCallback::ClearAndRun(&callback_, result);
   }
 
  private:
   scoped_refptr<TrackedCallback> callback_;
+  int renderer_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Talk);
 };
 
 }  // namespace
 
 PPB_Talk_Private_Proxy::PPB_Talk_Private_Proxy(Dispatcher* dispatcher)
     : InterfaceProxy(dispatcher) {
 }
 
 // static
 PP_Resource PPB_Talk_Private_Proxy::CreateProxyResource(PP_Instance instance) {
-  return (new Talk(instance))->GetReference();
+  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
+  if (!dispatcher)
+    return 0;
+
+  int renderer_id;
+  dispatcher->Send(new PpapiHostMsg_PPBTalk_GetRendererId(API_ID_PPB_TALK,
+      instance, &renderer_id));
+  return (new Talk(instance, renderer_id))->GetReference();
 }
 
 bool PPB_Talk_Private_Proxy::OnMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPB_Talk_Private_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiMsg_PPBTalk_GetPermissionACK,
                         OnMsgGetPermissionACK)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBTalk_GetRendererId, OnMsgGetRendererId)
     IPC_MESSAGE_UNHANDLED(handled = false);
   IPC_END_MESSAGE_MAP();
   return handled;
 }
 
 void PPB_Talk_Private_Proxy::OnMsgGetPermissionACK(uint32 /* dispatcher_id */,
                                                    PP_Resource resource,
                                                    int32_t result) {
   thunk::EnterResourceNoLock<thunk::PPB_Talk_Private_API> enter(
       resource, false);
   if (enter.succeeded())
     static_cast<Talk*>(enter.object())->GotCompletion(result);
 }
 
+void PPB_Talk_Private_Proxy::OnMsgGetRendererId(PP_Instance instance,
+                                                int* renderer_id) {
+  thunk::EnterResourceCreation enter(instance);
+  if (enter.succeeded()) {
+    PP_Resource resource = enter.functions()->CreateTalk(instance);
+    thunk::EnterResourceNoLock<thunk::PPB_Talk_Private_API> enter1(
+        resource, false);
+    if (enter1.succeeded())
+      *renderer_id = enter1.object()->GetRendererId();
+  }
+}
+
 }  // namespace proxy
 }  // namespace ppapi