Fix UpdateTilePriorities viewport in Android WebView.

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 1131 matching lines @@
   pass_list.push_back(child_pass.Pass());
   pass_list.push_back(root_pass.Pass());
 
   EXPECT_TRUE(this->RunPixelTest(
       &pass_list,
       PixelTest::NoOffscreenContext,
       base::FilePath(FILE_PATH_LITERAL("four_blue_green_checkers.png")),
       ExactPixelComparator(true)));
 }
 
+TEST_F(ExternalStencilPixelTest, DeviceClip) {
+  ClearBackgroundToGreen();
+  gfx::Rect clip_rect(gfx::Point(150, 150), gfx::Size(50, 50));
+  this->ForceDeviceClip(clip_rect);
+
+  // Draw a blue quad that covers the entire device viewport. It should be
+  // clipped to the bottom right corner by the device clip.
+  gfx::Rect rect(this->device_viewport_size_);
+  RenderPass::Id id(1, 1);
+  scoped_ptr<RenderPass> pass = CreateTestRootRenderPass(id, rect);
+  scoped_ptr<SharedQuadState> blue_shared_state =
+      CreateTestSharedQuadState(gfx::Transform(), rect);
+  scoped_ptr<SolidColorDrawQuad> blue = SolidColorDrawQuad::Create();
+  blue->SetNew(blue_shared_state.get(), rect, SK_ColorBLUE, false);
+  pass->quad_list.push_back(blue.PassAs<DrawQuad>());
+  RenderPassList pass_list;
+  pass_list.push_back(pass.Pass());
+
+  EXPECT_TRUE(this->RunPixelTest(
+      &pass_list,
+      PixelTest::NoOffscreenContext,
+      base::FilePath(FILE_PATH_LITERAL("green_with_blue_corner.png")),
+      ExactPixelComparator(true)));
+}
+
 // Software renderer does not support anti-aliased edges.
 TEST_F(GLRendererPixelTest, AntiAliasing) {
   gfx::Rect rect(this->device_viewport_size_);
 
   RenderPass::Id id(1, 1);
   scoped_ptr<RenderPass> pass = CreateTestRootRenderPass(id, rect);
 
   gfx::Transform red_content_to_target_transform;
   red_content_to_target_transform.Rotate(10);
   scoped_ptr<SharedQuadState> red_shared_state =
@@ skipping 476 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