Prefix string16 with base:: in ui/.

ui/views/corewm/tooltip_controller_test_helper.h

 // Copyright (c) 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.
 
 #ifndef UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_TEST_HELPER_H_
 #define UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_TEST_HELPER_H_
 
 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "ui/views/view.h"
@@ skipping 13 matching lines @@
 // TooltipControllerTestHelper provides access to TooltipControllers private
 // state.
 class TooltipControllerTestHelper {
  public:
   explicit TooltipControllerTestHelper(TooltipController* controller);
   ~TooltipControllerTestHelper();
 
   TooltipController* controller() { return controller_; }
 
   // These are mostly cover methods for TooltipController private methods.
-  string16 GetTooltipText();
+  base::string16 GetTooltipText();
   aura::Window* GetTooltipWindow();
   void FireTooltipTimer();
   bool IsTooltipTimerRunning();
   void FireTooltipShownTimer();
   bool IsTooltipShownTimerRunning();
   bool IsTooltipVisible();
 
  private:
   TooltipController* controller_;
 
   DISALLOW_COPY_AND_ASSIGN(TooltipControllerTestHelper);
 };
 
 // Trivial View subclass that lets you set the tooltip text.
 class TooltipTestView : public views::View {
  public:
   TooltipTestView();
   virtual ~TooltipTestView();
 
-  void set_tooltip_text(string16 tooltip_text) { tooltip_text_ = tooltip_text; }
+  void set_tooltip_text(base::string16 tooltip_text) {
+    tooltip_text_ = tooltip_text;
+  }
 
   // Overridden from views::View
   virtual bool GetTooltipText(const gfx::Point& p,
-                              string16* tooltip) const OVERRIDE;
+                              base::string16* tooltip) const OVERRIDE;
 
  private:
-  string16 tooltip_text_;
+  base::string16 tooltip_text_;
 
   DISALLOW_COPY_AND_ASSIGN(TooltipTestView);
 };
 
 
 }  // namespace test
 }  // namespace corewm
 }  // namespace views
 
 #endif  // UI_VIEWS_COREWM_TOOLTIP_CONTROLLER_TEST_HELPER_H_