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

chrome/browser/tab_contents/render_view_context_menu.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 <algorithm>
 #include <set>
 
 #include "chrome/browser/tab_contents/render_view_context_menu.h"
 
 #include "base/command_line.h"
@@ skipping 697 matching lines @@
 }
 
 void RenderViewContextMenu::AppendEditableItems() {
   // Append Dictionary spell check suggestions.
   for (size_t i = 0; i < params_.dictionary_suggestions.size() &&
        IDC_SPELLCHECK_SUGGESTION_0 + i <= IDC_SPELLCHECK_SUGGESTION_LAST;
        ++i) {
     menu_model_.AddItem(IDC_SPELLCHECK_SUGGESTION_0 + static_cast<int>(i),
                         params_.dictionary_suggestions[i]);
   }
-  if (params_.dictionary_suggestions.size() > 0)
+  if (!params_.dictionary_suggestions.empty())
     menu_model_.AddSeparator();
 
   // If word is misspelled, give option for "Add to dictionary"
   if (!params_.misspelled_word.empty()) {
     if (params_.dictionary_suggestions.empty()) {
       menu_model_.AddItem(0,
           l10n_util::GetStringUTF16(
               IDS_CONTENT_CONTEXT_NO_SPELLING_SUGGESTIONS));
     }
     menu_model_.AddItemWithStringId(IDC_SPELLCHECK_ADD_TO_DICTIONARY,
@@ skipping 803 matching lines @@
       profile_->GetPrefs()->GetString(prefs::kAcceptLanguages),
       g_browser_process->clipboard());
 }
 
 void RenderViewContextMenu::MediaPlayerActionAt(
     const gfx::Point& location,
     const WebMediaPlayerAction& action) {
   source_tab_contents_->render_view_host()->MediaPlayerActionAt(
       location, action);
 }