PPAPI: Make Messaging not PostTask and copy when out-of-process.

webkit/plugins/ppapi/message_channel.h

 // 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.
 
 #ifndef WEBKIT_PLUGINS_PPAPI_MESSAGE_CHANNEL_H_
 #define WEBKIT_PLUGINS_PPAPI_MESSAGE_CHANNEL_H_
 
+#include <deque>
+
 #include "base/memory/weak_ptr.h"
 #include "ppapi/shared_impl/resource.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSerializedScriptValue.h"
 #include "third_party/npapi/bindings/npruntime.h"
 
 struct PP_Var;
-namespace WebKit {
-class WebSerializedScriptValue;
-}
 
 namespace webkit {
 namespace ppapi {
 
 class PluginInstance;
 
 // MessageChannel implements bidirectional postMessage functionality, allowing
 // calls from JavaScript to plugins and vice-versa. See
 // PPB_Messaging::PostMessage and PPP_Messaging::HandleMessage for more
 // information.
@@ skipping 37 matching lines @@
     return passthrough_object_;
   }
   void SetPassthroughObject(NPObject* passthrough);
 
   NPObject* np_object() { return np_object_; }
 
   PluginInstance* instance() {
     return instance_;
   }
 
+  // Messages sent to JavaScript are queued by default. After the DOM is
+  // set up for the plugin, users of MessageChannel should call
+  // EndQueueingJavaScriptMessages to start dispatching messages to JavaScript.
+  void QueueJavaScriptMessages();
+  void EndQueueingJavaScriptMessages();

[dmichael (off chromium), 2012/12/11 18:55:55]

StopQueueingJavaScriptMessages? Slightly more imperative.

Or...  StopQueueingJavaScriptMessagesSoon(), to indicate it won't happen
immediately. (But that's probably getting too long)

[teravest, 2012/12/11 21:32:12]

Done.

+
  private:
   PluginInstance* instance_;
 
   // We pass all non-postMessage calls through to the passthrough_object_.
   // This way, a plugin can use PPB_Class or PPP_Class_Deprecated and also
   // postMessage.  This is necessary to support backwards-compatibility, and
   // also trusted plugins for which we will continue to support synchronous
   // scripting.
   NPObject* passthrough_object_;
 
   // The NPObject we use to expose postMessage to JavaScript.
   MessageChannelNPObject* np_object_;
 
   // Post a message to the onmessage handler for this channel's instance
   // synchronously.  This is used by PostMessageToJavaScript.
   void PostMessageToJavaScriptImpl(
       const WebKit::WebSerializedScriptValue& message_data);
   // Post a message to the PPP_Instance HandleMessage function for this
   // channel's instance.  This is used by PostMessageToNative.
   void PostMessageToNativeImpl(PP_Var message_data);
 
+  void DrainEarlyMessageQueue();
+
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<MessageChannel> weak_ptr_factory_;
 
+  bool queue_js_messages_;
+  std::deque<WebKit::WebSerializedScriptValue> early_message_queue_;
+
   DISALLOW_COPY_AND_ASSIGN(MessageChannel);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_MESSAGE_CHANNEL_H_