Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/ui/app_list/app_list_controller_browsertest.cc

 // Copyright 2013 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 "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
@@ skipping 43 matching lines @@
       : observed_result_(NULL),
         item_uninstall_count_(0),
         observed_results_list_(NULL) {}
 
   void WatchResultsLookingForItem(
       app_list::AppListModel::SearchResults* search_results,
       const std::string& extension_name) {
     EXPECT_FALSE(observed_results_list_);
     observed_results_list_ = search_results;
     observed_results_list_->AddObserver(this);
-    item_to_observe_ = ASCIIToUTF16(extension_name);
+    item_to_observe_ = base::ASCIIToUTF16(extension_name);
   }
 
   void StopWatchingResults() {
     EXPECT_TRUE(observed_results_list_);
     observed_results_list_->RemoveObserver(this);
   }
 
  protected:
   void AttemptToLocateItem() {
     if (observed_result_) {
@@ skipping 62 matching lines @@
   AppListService* service = test::GetAppListService();
   ASSERT_TRUE(service);
   service->ShowForProfile(browser()->profile());
 
   app_list::AppListModel* model = test::GetAppListModel(service);
   ASSERT_TRUE(model);
   WatchResultsLookingForItem(model->results(), extension->name());
 
   // Ensure a search finds the extension.
   EXPECT_FALSE(observed_result_);
-  model->search_box()->SetText(ASCIIToUTF16("minimal"));
+  model->search_box()->SetText(base::ASCIIToUTF16("minimal"));
   EXPECT_TRUE(observed_result_);
 
   // Ensure the UI is updated. This is via PostTask in views.
   base::RunLoop().RunUntilIdle();
 
   // Now uninstall and ensure this browser test observes it.
   EXPECT_EQ(0, item_uninstall_count_);
   UninstallExtension(extension->id());
   EXPECT_EQ(1, item_uninstall_count_);
 
   // Results should not be immediately refreshed. When they are, the item should
   // be removed from the model.
   EXPECT_TRUE(observed_result_);
   base::RunLoop().RunUntilIdle();
   EXPECT_FALSE(observed_result_);
   StopWatchingResults();
   service->DismissAppList();
 }