cc: Allow overlay candidates with transforms.

cc/output/overlay_strategy_fullscreen.cc

 // Copyright 2016 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/output/overlay_strategy_fullscreen.h"
 
 #include "cc/base/math_util.h"
 #include "cc/output/overlay_candidate_validator.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/quads/solid_color_draw_quad.h"
@@ skipping 29 matching lines @@
 
   const DrawQuad* quad = *front;
   if (quad->ShouldDrawWithBlending())
     return false;
 
   OverlayCandidate candidate;
   if (!OverlayCandidate::FromDrawQuad(resource_provider, quad, &candidate)) {
     return false;
   }
 
-  if (candidate.transform != gfx::OVERLAY_TRANSFORM_NONE) {
-    return false;
-  }
-
   if (!candidate.display_rect.origin().IsOrigin() ||
       gfx::ToRoundedSize(candidate.display_rect.size()) !=
           render_pass->output_rect.size() ||
       render_pass->output_rect.size() != candidate.resource_size_in_pixels) {
     return false;
   }
 
   candidate.plane_z_order = 0;
   candidate.overlay_handled = true;
   OverlayCandidateList new_candidate_list;
   new_candidate_list.push_back(candidate);
   capability_checker_->CheckOverlaySupport(&new_candidate_list);
   if (!new_candidate_list.front().overlay_handled)
     return false;
 
   candidate_list->swap(new_candidate_list);
 
   render_pass->quad_list = QuadList();  // Remove all the quads
   return true;
 }
 
 }  // namespace cc