Pure pedantry: Replace all ".size() == 0" with ".empty()".

content/browser/renderer_host/render_widget_host.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/browser/renderer_host/render_widget_host.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 1221 matching lines @@
 
 void RenderWidgetHost::AccessibilityDoDefaultAction(int acc_obj_id) {
   Send(new ViewMsg_AccessibilityDoDefaultAction(routing_id(), acc_obj_id));
 }
 
 void RenderWidgetHost::AccessibilityNotificationsAck() {
   Send(new ViewMsg_AccessibilityNotifications_ACK(routing_id()));
 }
 
 void RenderWidgetHost::ProcessKeyboardEventAck(int type, bool processed) {
-  if (key_queue_.size() == 0) {
+  if (key_queue_.empty()) {
     LOG(ERROR) << "Got a KeyEvent back from the renderer but we "
                << "don't seem to have sent it to the renderer!";
   } else if (key_queue_.front().type != type) {
     LOG(ERROR) << "We seem to have a different key type sent from "
                << "the renderer. (" << key_queue_.front().type << " vs. "
                << type << "). Ignoring event.";
 
     // Something must be wrong. Clear the |key_queue_| and
     // |suppress_next_char_events_| so that we can resume from the error.
     key_queue_.clear();
@@ skipping 25 matching lines @@
     return;
 
   for (int i = 0; i < static_cast<int>(deferred_plugin_handles_.size()); i++) {
 #if defined(TOOLKIT_USES_GTK)
     view_->CreatePluginContainer(deferred_plugin_handles_[i]);
 #endif
   }
 
   deferred_plugin_handles_.clear();
 }