Re-land: cc: Added antialiasing support for solid color layers

cc/gl_renderer_pixeltest.cc

Index: cc/gl_renderer_pixeltest.cc
diff --git a/cc/gl_renderer_pixeltest.cc b/cc/gl_renderer_pixeltest.cc
index 347428b690e0694a40d694c14b26100057ee9ace..85b0636a7b82336bfe77e757642f118847d4dc29 100644
--- a/cc/gl_renderer_pixeltest.cc
+++ b/cc/gl_renderer_pixeltest.cc
@@ -197,6 +197,54 @@ TEST_F(GLRendererPixelTest, RenderPassChangesSize) {
   EXPECT_TRUE(PixelsMatchReference(
       base::FilePath(FILE_PATH_LITERAL("blue_yellow.png")), viewport_rect));
 }
+
+// This test is flaky on Windows. We only enable it on Linux for now.

[jamesr, 2013/03/05 18:50:00]

Do we know why?

+#if defined(OS_LINUX)
+TEST_F(GLRendererPixelTest, AntiAliasing) {
+  gfx::Rect rect(0, 0, 200, 200);
+
+  RenderPass::Id id(1, 1);
+  scoped_ptr<RenderPass> pass = CreateTestRenderPass(id, rect);
+
+  gfx::Transform red_content_to_target_transform;
+  red_content_to_target_transform.Rotate(10);
+  scoped_ptr<SharedQuadState> red_shared_state =
+      CreateTestSharedQuadState(red_content_to_target_transform, rect);
+
+  scoped_ptr<SolidColorDrawQuad> red = SolidColorDrawQuad::Create();
+  red->SetNew(red_shared_state.get(), rect, SK_ColorRED);
+
+  pass->quad_list.push_back(red.PassAs<DrawQuad>());
+
+  gfx::Transform yellow_content_to_target_transform;
+  yellow_content_to_target_transform.Rotate(5);
+  scoped_ptr<SharedQuadState> yellow_shared_state =
+      CreateTestSharedQuadState(yellow_content_to_target_transform, rect);
+
+  scoped_ptr<SolidColorDrawQuad> yellow = SolidColorDrawQuad::Create();
+  yellow->SetNew(yellow_shared_state.get(), rect, SK_ColorYELLOW);
+
+  pass->quad_list.push_back(yellow.PassAs<DrawQuad>());
+
+  gfx::Transform blue_content_to_target_transform;
+  scoped_ptr<SharedQuadState> blue_shared_state =
+      CreateTestSharedQuadState(blue_content_to_target_transform, rect);
+
+  scoped_ptr<SolidColorDrawQuad> blue = SolidColorDrawQuad::Create();
+  blue->SetNew(blue_shared_state.get(), rect, SK_ColorBLUE);
+
+  pass->quad_list.push_back(blue.PassAs<DrawQuad>());
+
+  RenderPassList pass_list;
+  pass_list.push_back(pass.Pass());
+
+  renderer_->drawFrame(pass_list);
+
+  EXPECT_TRUE(PixelsMatchReference(
+      base::FilePath(FILE_PATH_LITERAL("anti_aliasing.png")), rect));
+}
+#endif  // defined(OS_LINUX)
+
 #endif
 
 }  // namespace