Adds a TransportDIB::Id value that is explicitly invalid and use it when compositing

content/browser/renderer_host/mock_render_process_host.cc

 // Copyright (c) 2009 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/renderer_host/mock_render_process_host.h"
 
 #include "content/browser/child_process_security_policy.h"
 
 MockRenderProcessHost::MockRenderProcessHost(Profile* profile)
     : RenderProcessHost(profile),
@@ skipping 93 matching lines @@
 #if defined(OS_WIN)
   HANDLE duped;
   DuplicateHandle(GetCurrentProcess(), dib_id.handle, GetCurrentProcess(),
                   &duped, 0, TRUE, DUPLICATE_SAME_ACCESS);
   transport_dib_ = TransportDIB::Map(duped);
 #elif defined(OS_MACOSX)
   // On Mac, TransportDIBs are always created in the browser, so we cannot map
   // one from a dib_id.
   transport_dib_ = TransportDIB::Create(100 * 100 * 4, 0);
 #elif defined(OS_POSIX)
-  transport_dib_ = TransportDIB::Map(dib_id);
+  transport_dib_ = TransportDIB::Map(dib_id.shmkey);
 #endif
 
   return transport_dib_;
 }
 
 bool MockRenderProcessHost::OnMessageReceived(const IPC::Message& msg) {
   return false;
 }
 
 void MockRenderProcessHost::OnChannelConnected(int32 peer_pid) {
@@ skipping 22 matching lines @@
 
 void MockRenderProcessHostFactory::Remove(MockRenderProcessHost* host) const {
   for (ScopedVector<MockRenderProcessHost>::iterator it = processes_.begin();
        it != processes_.end(); ++it) {
     if (*it == host) {
       processes_.weak_erase(it);
       break;
     }
   }
 }