fix uninitialized variable warning for vs2012 compilation

content/renderer/render_thread_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_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 717 matching lines @@
   WebSecurityPolicy::registerURLSchemeAsDisplayIsolated(swappedout_scheme);
   WebSecurityPolicy::registerURLSchemeAsEmptyDocument(swappedout_scheme);
 }
 
 void RenderThreadImpl::RecordUserMetrics(const std::string& action) {
   Send(new ViewHostMsg_UserMetricsRecordAction(action));
 }
 
 base::SharedMemoryHandle RenderThreadImpl::HostAllocateSharedMemoryBuffer(
     uint32 buffer_size) {
-  base::SharedMemoryHandle mem_handle;
+  base::SharedMemoryHandle mem_handle = base::SharedMemoryHandle();

[jamesr, 2012/10/12 19:33:57]

can you just do mem_handle(); ?

[scottmg, 2012/10/12 19:35:56]

That'd be a function prototype I think.

   Send(new ChildProcessHostMsg_SyncAllocateSharedMemory(
                 buffer_size, &mem_handle));
   return mem_handle;
 }
 
 void RenderThreadImpl::RegisterExtension(v8::Extension* extension) {
   WebScriptController::registerExtension(extension);
 }
 
 void RenderThreadImpl::ScheduleIdleHandler(int64 initial_delay_ms) {
@@ skipping 400 matching lines @@
 
 scoped_refptr<base::MessageLoopProxy>
 RenderThreadImpl::GetFileThreadMessageLoopProxy() {
   DCHECK(message_loop() == MessageLoop::current());
   if (!file_thread_.get()) {
     file_thread_.reset(new base::Thread("Renderer::FILE"));
     file_thread_->Start();
   }
   return file_thread_->message_loop_proxy();
 }