Make new-style page scale work on Android.

ui/gfx/screen_android.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/gfx/screen.h"
 
 #include "base/logging.h"
 #include "ui/gfx/display.h"
 
 namespace gfx {
 
 class ScreenAndroid : public Screen {
  public:
   ScreenAndroid() {}
 
   bool IsDIPEnabled() OVERRIDE {
-    return false;
+    return true;
   }
 
   gfx::Point GetCursorScreenPoint() OVERRIDE {
     return gfx::Point();
   }
 
   gfx::NativeWindow GetWindowAtCursorScreenPoint() OVERRIDE {
     NOTIMPLEMENTED();
     return NULL;
   }
@@ skipping 30 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScreenAndroid);
 };
 
 Screen* CreateNativeScreen() {
   return new ScreenAndroid;
 }
 
 }  // namespace gfx