Make callers of CommandLine use it via the base:: namespace.

chrome/browser/renderer_context_menu/spelling_menu_observer.cc

 // Copyright 2014 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_context_menu/spelling_menu_observer.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/i18n/case_conversion.h"
 #include "base/prefs/pref_service.h"
@@ skipping 153 matching lines @@
   }
 
   // If word is misspelled, give option for "Add to dictionary" and a check item
   // "Ask Google for suggestions".
   proxy_->AddMenuItem(IDC_SPELLCHECK_ADD_TO_DICTIONARY,
       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_ADD_TO_DICTIONARY));
 
   proxy_->AddCheckItem(IDC_CONTENT_CONTEXT_SPELLING_TOGGLE,
       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_SPELLING_ASK_GOOGLE));
 
-  const CommandLine* command_line = CommandLine::ForCurrentProcess();
+  const base::CommandLine* command_line =
+      base::CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kEnableSpellingAutoCorrect)) {
     proxy_->AddCheckItem(IDC_CONTENT_CONTEXT_AUTOCORRECT_SPELLING_TOGGLE,
         l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_SPELLING_AUTOCORRECT));
   }
 
   proxy_->AddSeparator();
 }
 
 bool SpellingMenuObserver::IsCommandIdSupported(int command_id) {
   if (command_id >= IDC_SPELLCHECK_SUGGESTION_0 &&
@@ skipping 218 matching lines @@
   // Append '.' characters to the end of "Checking".
   loading_frame_ = (loading_frame_ + 1) & 3;
   base::string16 loading_message =
       loading_message_ + base::string16(loading_frame_,'.');
 
   // Update the menu item with the text. We disable this item to prevent users
   // from selecting it.
   proxy_->UpdateMenuItem(IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION, false, false,
                          loading_message);
 }