[Ozone] Constrain the cursor when overscan insets are set

ui/platform_window/platform_window.h

 // Copyright 2014 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_PLATFORM_WINDOW_PLATFORM_WINDOW_H_
 #define UI_PLATFORM_WINDOW_PLATFORM_WINDOW_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/cursor/cursor.h"
 
@@ skipping 23 matching lines @@
   virtual gfx::Rect GetBounds() = 0;
 
   virtual void SetCapture() = 0;
   virtual void ReleaseCapture() = 0;
 
   virtual void ToggleFullscreen() = 0;
   virtual void Maximize() = 0;
   virtual void Minimize() = 0;
   virtual void Restore() = 0;
 
   virtual void SetCursor(PlatformCursor cursor) = 0;

[pkotwicz, 2015/01/23 03:40:27]

We should have a comment about the coordinates of MoveCursorTo() and
ConfineCursorToBounds(). What's the name for the coordinate system? Host
coordinates?

[spang, 2015/01/23 18:18:40]

Could call them "platform window coordinates". "Host" coordinates only means
something in aura and above, but this is below.

   virtual void MoveCursorTo(const gfx::Point& location) = 0;
+  virtual void ConfineCursorToBounds(const gfx::Rect& bounds) = 0;
 };
 
 }  // namespace ui
 
 #endif  // UI_PLATFORM_WINDOW_PLATFORM_WINDOW_H_