<webview>: Implement WebRequest API

content/browser/browser_plugin/browser_plugin_guest.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/browser/browser_plugin/browser_plugin_guest.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/message_loop.h"
@@ skipping 257 matching lines @@
       damage_buffer_size_(0),
       damage_buffer_scale_factor_(1.0f),
       guest_device_scale_factor_(1.0f),
       guest_hang_timeout_(
           base::TimeDelta::FromMilliseconds(kHungRendererDelayMs)),
       focused_(false),
       mouse_locked_(false),
       pending_lock_request_(false),
       embedder_visible_(true),
       next_permission_request_id_(0),
-      has_render_view_(has_render_view) {
+      has_render_view_(has_render_view),
+      is_being_destroyed_(false) {
   DCHECK(web_contents);
   web_contents->SetDelegate(this);
   if (opener)
     opener_ = opener->AsWeakPtr();
   GetWebContents()->GetBrowserPluginGuestManager()->AddGuest(instance_id_,
                                                              GetWebContents());
 }
 
 bool BrowserPluginGuest::AddMessageToConsole(WebContents* source,
                                              int32 level,
@@ skipping 24 matching lines @@
   for (PendingWindowMap::const_iterator it = pending_new_windows.begin();
        it != pending_new_windows.end(); ++it) {
     it->first->Destroy();
   }
   // All pending windows should be removed from the set after Destroy() is
   // called on all of them.
   DCHECK_EQ(0ul, pending_new_windows_.size());
 }
 
 void BrowserPluginGuest::Destroy() {
+  if (is_being_destroyed_)
+    return;
+  is_being_destroyed_ = true;
   if (!attached() && opener())
     opener()->pending_new_windows_.erase(this);
   DestroyUnattachedWindows();
   GetWebContents()->GetBrowserPluginGuestManager()->RemoveGuest(instance_id_);
-  delete GetWebContents();
+  if (!GetWebContents()->IsBeingDestroyed())
+    delete GetWebContents();
 }
 
 bool BrowserPluginGuest::OnMessageReceivedFromEmbedder(
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(BrowserPluginGuest, message)
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_BuffersSwappedACK,
                         OnSwapBuffersACK)
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_CompositorFrameACK,
                         OnCompositorFrameACK)
@@ skipping 1209 matching lines @@
                    base::Value::CreateStringValue(request_method));
   request_info.Set(browser_plugin::kURL, base::Value::CreateStringValue(url));
 
   SendMessageToEmbedder(
       new BrowserPluginMsg_RequestPermission(instance_id(),
           BrowserPluginPermissionTypeDownload, permission_request_id,
           request_info));
 }
 
 }  // namespace content