Change other usages of .size() to .empty() when applicable.

chrome/renderer/render_thread.cc

 // Copyright (c) 2010 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 "chrome/renderer/render_thread.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 1072 matching lines @@
 void RenderThread::OnSetIsIncognitoProcess(bool is_incognito_process) {
   is_incognito_process_ = is_incognito_process;
 }
 
 void RenderThread::OnGpuChannelEstablished(
     const IPC::ChannelHandle& channel_handle,
     base::ProcessHandle renderer_process_for_gpu,
     const GPUInfo& gpu_info) {
   gpu_channel_->set_gpu_info(gpu_info);
 
-  if (channel_handle.name.size() != 0) {
+  if (!channel_handle.name.empty()) {
     // Connect to the GPU process if a channel name was received.
     gpu_channel_->Connect(channel_handle, renderer_process_for_gpu);
   } else {
     // Otherwise cancel the connection.
     gpu_channel_ = NULL;
   }
 }
 
 void RenderThread::OnSetPhishingModel(IPC::PlatformFileForTransit model_file) {
   safe_browsing::PhishingClassifierDelegate::SetPhishingModel(model_file);
@@ skipping 29 matching lines @@
   }
 
   return false;
 }
 
 void RenderThread::RegisterExtension(v8::Extension* extension,
                                      bool restrict_to_extensions) {
   WebScriptController::registerExtension(extension);
   v8_extensions_[extension->name()] = restrict_to_extensions;
 }