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

chrome_frame/chrome_frame_automation.cc

 // Copyright (c) 2011 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_frame/chrome_frame_automation.h"
 
 #include "app/app_switches.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
@@ skipping 992 matching lines @@
 
 void ChromeFrameAutomationClient::SetEnableExtensionAutomation(
     const std::vector<std::string>& functions_enabled) {
   if (!is_initialized())
     return;
 
   // We are doing initialization, so there is no need to reset extension
   // automation, only to set it.  Also, we want to avoid resetting extension
   // automation that some other automation client has set up.  Therefore only
   // send the message if we are going to enable automation of some functions.
-  if (functions_enabled.size() > 0) {
+  if (!functions_enabled.empty())
     tab_->SetEnableExtensionAutomation(functions_enabled);
-  }
 }
 
 // Invoked in launch background thread.
 void ChromeFrameAutomationClient::LaunchComplete(
     ChromeFrameAutomationProxy* proxy,
     AutomationLaunchResult result) {
   // If we're shutting down we don't keep a pointer to the automation server.
   if (init_state_ != UNINITIALIZING) {
     DCHECK(init_state_ == INITIALIZING);
     automation_server_ = proxy;
@@ skipping 438 matching lines @@
     const net::URLRequestStatus& status) {
   automation_server_->Send(new AutomationMsg_RequestEnd(
       tab_->handle(), request_id, status));
 }
 
 void ChromeFrameAutomationClient::OnCookiesRetrieved(bool success,
     const GURL& url, const std::string& cookie_string, int cookie_id) {
   automation_server_->Send(new AutomationMsg_GetCookiesHostResponse(
       tab_->handle(), success, url, cookie_string, cookie_id));
 }