Scale the ALPHA_THRESHOLD filter's region based on the device scale factor.

cc/test/render_pass_test_common.cc

 // Copyright 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 "cc/test/render_pass_test_common.h"
 
 #include "cc/quads/checkerboard_draw_quad.h"
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/quads/io_surface_draw_quad.h"
 #include "cc/quads/render_pass_draw_quad.h"
@@ skipping 97 matching lines @@
         RenderPassDrawQuad::Create();
     render_pass_quad->SetNew(shared_state,
                              rect,
                              visible_rect,
                              child_pass,
                              false,
                              resource5,
                              rect,
                              gfx::RectF(),
                              FilterOperations(),
-                             FilterOperations());
+                             FilterOperations(),
+                             gfx::Vector2dF(1.f, 1.f));
     AppendQuad(render_pass_quad.PassAs<DrawQuad>());
 
     scoped_ptr<RenderPassDrawQuad> render_pass_replica_quad =
         RenderPassDrawQuad::Create();
     render_pass_replica_quad->SetNew(shared_state,
                                      rect,
                                      visible_rect,
                                      child_pass,
                                      true,
                                      resource5,
                                      rect,
                                      gfx::RectF(),
                                      FilterOperations(),
-                                     FilterOperations());
+                                     FilterOperations(),
+                                     gfx::Vector2dF(1.f, 1.f));
     AppendQuad(render_pass_replica_quad.PassAs<DrawQuad>());
   }
 
   scoped_ptr<SolidColorDrawQuad> solid_color_quad =
       SolidColorDrawQuad::Create();
   solid_color_quad->SetNew(
       shared_state, rect, visible_rect, SK_ColorRED, false);
   AppendQuad(solid_color_quad.PassAs<DrawQuad>());
 
   scoped_ptr<StreamVideoDrawQuad> stream_video_quad =
@@ skipping 88 matching lines @@
                    gfx::RectF(0, 0, 100, 100),
                    plane_resources[0],
                    plane_resources[1],
                    plane_resources[2],
                    plane_resources[3],
                    color_space);
   AppendQuad(yuv_quad.PassAs<DrawQuad>());
 }
 
 }  // namespace cc