Add context to gfx::Screen calls in support of simultaneous desktop+ash

ui/views/widget/tooltip_manager.h

 // Copyright (c) 2011 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_WIDGET_TOOLTIP_MANAGER_H_
 #define UI_VIEWS_WIDGET_TOOLTIP_MANAGER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/string16.h"
+#include "ui/gfx/native_widget_types.h"
 #include "ui/views/views_export.h"
 
 namespace gfx {
 class Font;
 }  // namespace gfx
 
 namespace views {
 
 class View;
 
 // TooltipManager takes care of the wiring to support tooltips for Views. You
 // almost never need to interact directly with TooltipManager, rather look to
 // the various tooltip methods on View.
 class VIEWS_EXPORT TooltipManager {
  public:
   // Returns the height of tooltips. This should only be invoked from within
   // GetTooltipTextOrigin.
   static int GetTooltipHeight();
 
   // Returns the default font used by tooltips.
   static gfx::Font GetDefaultFont();
 
   // Returns the maximum width of the tooltip. |x| and |y| give the location
-  // the tooltip is to be displayed on in screen coordinates.
-  static int GetMaxWidth(int x, int y);
+  // the tooltip is to be displayed on in screen coordinates. |context| is
+  // used to determine which gfx::Screen should be used.
+  static int GetMaxWidth(int x, int y, gfx::NativeView context);
 
   TooltipManager() {}
   virtual ~TooltipManager() {}
 
   // Notification that the view hierarchy has changed in some way.
   virtual void UpdateTooltip() = 0;
 
   // Invoked when the tooltip text changes for the specified views.
   virtual void TooltipTextChanged(View* view) = 0;
 
   // Invoked when toolbar icon gets focus.
   virtual void ShowKeyboardTooltip(View* view) = 0;
 
   // Invoked when toolbar loses focus.
   virtual void HideKeyboardTooltip() = 0;
 
  protected:
   // Trims the tooltip to fit, setting |text| to the clipped result,
   // |max_width| to the width (in pixels) of the clipped text and |line_count|
   // to the number of lines of text in the tooltip. |x| and |y| give the
-  // location of the tooltip in screen coordinates.
+  // location of the tooltip in screen coordinates. |context| is used to
+  // determine which gfx::Screen should be used.
   static void TrimTooltipToFit(string16* text,
                                int* max_width,
                                int* line_count,
                                int x,
-                               int y);
+                               int y,
+                               gfx::NativeView context);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_TOOLTIP_MANAGER_H_