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

chrome/browser/autocomplete/autocomplete_provider_unittest.cc

 // Copyright (c) 2012 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 "components/omnibox/autocomplete_provider.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 527 matching lines @@
 TEST_F(AutocompleteProviderTest, AllowExactKeywordMatch) {
   ResetControllerWithKeywordAndSearchProviders();
   RunExactKeymatchTest(true);
   RunExactKeymatchTest(false);
 }
 
 // Ensures matches from (only) the default search provider respect any extra
 // query params set on the command line.
 TEST_F(AutocompleteProviderTest, ExtraQueryParams) {
   ResetControllerWithKeywordAndSearchProviders();
-  CommandLine::ForCurrentProcess()->AppendSwitchASCII(
+  base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kExtraSearchQueryParams, "a=b");
   RunExactKeymatchTest(true);
   CopyResults();
   ASSERT_EQ(2U, result_.size());
   EXPECT_EQ("http://keyword/test",
             result_.match_at(0)->destination_url.possibly_invalid_spec());
   EXPECT_EQ("http://defaultturl/k%20test?a=b",
             result_.match_at(1)->destination_url.possibly_invalid_spec());
 }
 
@@ skipping 168 matching lines @@
   url = GetDestinationURL(match, base::TimeDelta::FromMilliseconds(2456));
   EXPECT_EQ("//aqs=chrome.0.69i57j69i58j5l2j0l3j69i59.2456j0j4&", url.path());
 
   // Test page classification and field trial triggered set.
   controller_->search_provider_->field_trial_triggered_in_session_ = true;
   EXPECT_TRUE(
       controller_->search_provider_->field_trial_triggered_in_session());
   url = GetDestinationURL(match, base::TimeDelta::FromMilliseconds(2456));
   EXPECT_EQ("//aqs=chrome.0.69i57j69i58j5l2j0l3j69i59.2456j1j4&", url.path());
 }