Prefix string16 with base:: in ui/.

ui/app_list/views/apps_grid_view_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 "ui/app_list/views/apps_grid_view.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 417 matching lines @@
       first_index_on_page2)));
 }
 
 TEST_F(AppsGridViewTest, ItemLabelShortNameOverride) {
   // If the app's full name and short name differ, the title label's tooltip
   // should always be the full name of the app.
   std::string expected_text("xyz");
   std::string expected_tooltip("tooltip");
   model_->CreateAndAddItem(expected_text, expected_tooltip);
 
-  string16 actual_tooltip;
+  base::string16 actual_tooltip;
   AppListItemView* item_view = GetItemViewAt(0);
   ASSERT_TRUE(item_view);
   const views::Label* title_label = item_view->title();
   EXPECT_TRUE(title_label->GetTooltipText(
       title_label->bounds().CenterPoint(), &actual_tooltip));
   EXPECT_EQ(expected_tooltip, UTF16ToUTF8(actual_tooltip));
   EXPECT_EQ(expected_text, UTF16ToUTF8(title_label->text()));
 }
 
 TEST_F(AppsGridViewTest, ItemLabelNoShortName) {
   // If the app's full name and short name are the same, use the default tooltip
   // behavior of the label (only show a tooltip if the title is truncated).
   std::string title("a");
   model_->CreateAndAddItem(title, title);
 
-  string16 actual_tooltip;
+  base::string16 actual_tooltip;
   AppListItemView* item_view = GetItemViewAt(0);
   ASSERT_TRUE(item_view);
   const views::Label* title_label = item_view->title();
   EXPECT_FALSE(title_label->GetTooltipText(
       title_label->bounds().CenterPoint(), &actual_tooltip));
   EXPECT_EQ(title, UTF16ToUTF8(title_label->text()));
 }
 
 }  // namespace test
 }  // namespace app_list