Texture provider to feed data to the impl side thread for webview compositing.

content/renderer/browser_plugin/browser_plugin_compositing_filter.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 "content/common/browser_plugin_messages.h"
+#include "content/renderer/browser_plugin/browser_plugin_compositing_filter.h"
+
+namespace content {
+
+BrowserPluginCompositingFilter::BrowserPluginCompositingFilter(
+    base::TaskRunner* target_task_runner,
+    int instance_id,
+    const Handler& handler)
+    : target_task_runner_(target_task_runner),
+      instance_id_(instance_id),
+      handler_(handler){
+
+  DCHECK(target_task_runner_);
+  message_ids_to_filter_.insert(BrowserPluginMsg_BuffersSwapped::ID);
+  message_ids_to_filter_.insert(BrowserPluginMsg_SurfaceResize::ID);
+}
+
+int BrowserPluginCompositingFilter::GetPluginInstanceID(
+    const IPC::Message& message) {
+  int instance_id;
+  DCHECK(!message.is_sync());
+  PickleIterator iter(message);
+  bool success = iter.ReadInt(&instance_id);
+  DCHECK(success);
+  return instance_id;
+}
+
+bool BrowserPluginCompositingFilter::OnMessageReceived(
+    const IPC::Message& message) {
+  if (message_ids_to_filter_.find(message.type()) ==
+      message_ids_to_filter_.end() ||
+      GetPluginInstanceID(message) != instance_id_)
+    return false;
+
+  target_task_runner_->PostTask(FROM_HERE, base::Bind(handler_, message));
+  return true;
+}
+
+BrowserPluginCompositingFilter::~BrowserPluginCompositingFilter() {
+}
+
+}  // namespace IPC