Remove views::KeyEvent, replacing uses of it with ui::KeyEvent.

ui/views/controls/tree/tree_view_views.h

Index: ui/views/controls/tree/tree_view_views.h
===================================================================
--- ui/views/controls/tree/tree_view_views.h	(revision 150588)
+++ ui/views/controls/tree/tree_view_views.h	(working copy)
@@ -128,7 +128,7 @@
   virtual void ContentsChanged(Textfield* sender,
                                const string16& new_contents) OVERRIDE;
   virtual bool HandleKeyEvent(Textfield* sender,
-                              const KeyEvent& key_event) OVERRIDE;
+                              const ui::KeyEvent& key_event) OVERRIDE;
 
   // FocusChangeListener overrides:
   virtual void OnWillChangeFocus(View* focused_before,
@@ -139,7 +139,7 @@
  protected:
   // View overrides:
   virtual gfx::Point GetKeyboardContextMenuLocation() OVERRIDE;
-  virtual bool OnKeyPressed(const KeyEvent& event) OVERRIDE;
+  virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual void OnFocus() OVERRIDE;
   virtual void OnBlur() OVERRIDE;