Ignore InputMsg IPCs if RenderView is in swapped out state.

content/renderer/render_view_impl.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/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 1258 matching lines @@
     const blink::WebActiveWheelFlingParameters& params) {
   if (webview())
     webview()->transferActiveWheelFlingAnimation(params);
 }
 
 bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
   WebFrame* main_frame = webview() ? webview()->mainFrame() : NULL;
   if (main_frame && main_frame->isWebLocalFrame())
     GetContentClient()->SetActiveURL(main_frame->document().url());
 
+  // Input IPC messages must not be processed if the RenderView is in
+  // swapped out state.
+  if (is_swapped_out_ && IPC_MESSAGE_ID_CLASS(message.type()) == InputMsgStart)
+    return false;
+
   base::ObserverListBase<RenderViewObserver>::Iterator it(&observers_);
   RenderViewObserver* observer;
   while ((observer = it.GetNext()) != NULL)
     if (observer->OnMessageReceived(message))
       return true;
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderViewImpl, message)
     IPC_MESSAGE_HANDLER(InputMsg_ExecuteEditCommand, OnExecuteEditCommand)
     IPC_MESSAGE_HANDLER(InputMsg_MoveCaret, OnMoveCaret)
@@ skipping 1770 matching lines @@
 
 GURL RenderViewImpl::GetURLForGraphicsContext3D() {
   DCHECK(webview());
   if (webview()->mainFrame()->isWebLocalFrame())
     return GURL(webview()->mainFrame()->document().url());
   else
     return GURL("chrome://gpu/RenderViewImpl::CreateGraphicsContext3D");
 }
 
 void RenderViewImpl::OnSetFocus(bool enable) {
+  // This message must always be received when the main frame is a
+  // WebLocalFrame.
+  CHECK(webview()->mainFrame()->isWebLocalFrame());
   RenderWidget::OnSetFocus(enable);
 
 #if defined(ENABLE_PLUGINS)
   if (webview() && webview()->isActive()) {
     // Notify all NPAPI plugins.
     std::set<WebPluginDelegateProxy*>::iterator plugin_it;
     for (plugin_it = plugin_delegates_.begin();
          plugin_it != plugin_delegates_.end(); ++plugin_it) {
 #if defined(OS_MACOSX)
       // RenderWidget's call to setFocus can cause the underlying webview's
@@ skipping 603 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content