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

content/browser/renderer_host/render_view_host.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 "content/browser/renderer_host/render_view_host.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 1581 matching lines @@
     process()->profile()->GetExtensionMessageService()->
         PostMessageFromRenderer(port_id, message);
   }
 }
 
 void RenderViewHost::OnAccessibilityNotifications(
     const std::vector<ViewHostMsg_AccessibilityNotification_Params>& params) {
   if (view())
     view()->OnAccessibilityNotifications(params);
 
-  if (params.size() > 0) {
+  if (!params.empty()) {
     for (unsigned i = 0; i < params.size(); i++) {
       const ViewHostMsg_AccessibilityNotification_Params& param = params[i];
 
       if (param.notification_type ==
               ViewHostMsg_AccessibilityNotification_Params::
                   NOTIFICATION_TYPE_LOAD_COMPLETE) {
         // TODO(ctguil): Remove when mac processes OnAccessibilityNotifications.
         if (view())
           view()->UpdateAccessibilityTree(param.acc_obj);
 
@@ skipping 89 matching lines @@
     LOG(DFATAL) << "Invalid checked state " << checked_state;
     return;
   }
 
   CommandState state;
   state.is_enabled = is_enabled;
   state.checked_state =
       static_cast<RenderViewCommandCheckedState>(checked_state);
   command_states_[static_cast<RenderViewCommand>(command)] = state;
 }