mix-blend-mode implementation for accelerated layers

cc/output/renderer_pixeltest.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 "base/message_loop/message_loop.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/output/gl_renderer.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/quads/picture_draw_quad.h"
 #include "cc/quads/texture_draw_quad.h"
@@ skipping 31 matching lines @@
   return pass.Pass();
 }
 
 scoped_ptr<SharedQuadState> CreateTestSharedQuadState(
     gfx::Transform content_to_target_transform, gfx::Rect rect) {
   const gfx::Size content_bounds = rect.size();
   const gfx::Rect visible_content_rect = rect;
   const gfx::Rect clip_rect = rect;
   const bool is_clipped = false;
   const float opacity = 1.0f;
+  const SkXfermode::Mode blend_mode = SkXfermode::kSrcOver_Mode;
   scoped_ptr<SharedQuadState> shared_state = SharedQuadState::Create();
   shared_state->SetAll(content_to_target_transform,
                        content_bounds,
                        visible_content_rect,
                        clip_rect,
                        is_clipped,
-                       opacity);
+                       opacity,
+                       blend_mode);
   return shared_state.Pass();
 }
 
 scoped_ptr<SharedQuadState> CreateTestSharedQuadStateClipped(
     gfx::Transform content_to_target_transform,
     gfx::Rect rect,
     gfx::Rect clip_rect) {
   const gfx::Size content_bounds = rect.size();
   const gfx::Rect visible_content_rect = clip_rect;
   const bool is_clipped = true;
   const float opacity = 1.0f;
+  const SkXfermode::Mode blend_mode = SkXfermode::kSrcOver_Mode;
   scoped_ptr<SharedQuadState> shared_state = SharedQuadState::Create();
   shared_state->SetAll(content_to_target_transform,
                        content_bounds,
                        visible_content_rect,
                        clip_rect,
                        is_clipped,
-                       opacity);
+                       opacity,
+                       blend_mode);
   return shared_state.Pass();
 }
 
 scoped_ptr<DrawQuad> CreateTestRenderPassDrawQuad(
     SharedQuadState* shared_state, gfx::Rect rect, RenderPass::Id pass_id) {
   scoped_ptr<RenderPassDrawQuad> quad = RenderPassDrawQuad::Create();
   quad->SetNew(shared_state,
                rect,
                pass_id,
                false,                 // is_replica
@@ skipping 1921 matching lines @@
   EXPECT_TRUE(this->RunPixelTest(
       &pass_list,
       PixelTest::NoOffscreenContext,
       base::FilePath(FILE_PATH_LITERAL("four_blue_green_checkers.png")),
       ExactPixelComparator(true)));
 }
 #endif  // !defined(OS_ANDROID)
 
 }  // namespace
 }  // namespace cc