Revert of Avoid Copying damage rect when using Overlays

cc/output/overlay_candidate.cc

 // 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.
 
 #include "cc/output/overlay_candidate.h"
 
 #include <algorithm>
 #include <limits>
 #include "base/logging.h"
 #include "cc/base/math_util.h"
@@ skipping 157 matching lines @@
 }  // namespace
 
 OverlayCandidate::OverlayCandidate()
     : transform(gfx::OVERLAY_TRANSFORM_NONE),
       format(RGBA_8888),
       uv_rect(0.f, 0.f, 1.f, 1.f),
       is_clipped(false),
       use_output_surface_for_resource(false),
       resource_id(0),
       plane_z_order(0),
-      needs_blending(false),
       overlay_handled(false) {}
 
 OverlayCandidate::~OverlayCandidate() {}
 
 // static
 bool OverlayCandidate::FromDrawQuad(ResourceProvider* resource_provider,
                                     const DrawQuad* quad,
                                     OverlayCandidate* candidate) {
   if (quad->needs_blending || quad->shared_quad_state->opacity != 1.f ||
       quad->shared_quad_state->blend_mode != SkXfermode::kSrcOver_Mode)
     return false;
 
   auto& transform = quad->shared_quad_state->quad_to_target_transform;
   candidate->display_rect = gfx::RectF(quad->rect);
   transform.TransformRect(&candidate->display_rect);
   candidate->quad_rect_in_target_space =
       MathUtil::MapEnclosingClippedRect(transform, quad->rect);
 
   candidate->format = RGBA_8888;
   candidate->clip_rect = quad->shared_quad_state->clip_rect;
   candidate->is_clipped = quad->shared_quad_state->is_clipped;
-  candidate->needs_blending =
-      quad->shared_quad_state->opacity < 1.0f || quad->needs_blending;
 
   switch (quad->material) {
     case DrawQuad::TEXTURE_CONTENT:
       return FromTextureQuad(resource_provider,
                              TextureDrawQuad::MaterialCast(quad), candidate);
     case DrawQuad::STREAM_VIDEO_CONTENT:
       return FromStreamVideoQuad(resource_provider,
                                  StreamVideoDrawQuad::MaterialCast(quad),
                                  candidate);
     case DrawQuad::IO_SURFACE_CONTENT:
@@ skipping 94 matching lines @@
   if (overlay_transform != gfx::OVERLAY_TRANSFORM_NONE)
     return false;
   candidate->resource_id = quad->io_surface_resource_id();
   candidate->resource_size_in_pixels = quad->io_surface_size;
   candidate->transform = overlay_transform;
   candidate->uv_rect = gfx::RectF(1.f, 1.f);
   return true;
 }
 
 }  // namespace cc