Reusing base::IdType<...> to implement SurfaceId.

cc/test/surface_aggregator_test_helpers.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/test/surface_aggregator_test_helpers.h"
 
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/delegated_frame_data.h"
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/surface_draw_quad.h"
 #include "cc/surfaces/surface.h"
 #include "cc/test/render_pass_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 
 namespace cc {
 namespace test {
 
+Quad::Quad()
+    : material(DrawQuad::INVALID), opacity(1.f), color(SK_ColorWHITE) {}
+
+// static
+Quad Quad::SolidColorQuad(SkColor color) {
+  Quad quad;
+  quad.material = DrawQuad::SOLID_COLOR;
+  quad.color = color;
+  return quad;
+}
+
+// static
+Quad Quad::SurfaceQuad(SurfaceId surface_id, float opacity) {
+  Quad quad;
+  quad.material = DrawQuad::SURFACE_CONTENT;
+  quad.opacity = opacity;
+  quad.surface_id = surface_id;
+  return quad;
+}
+
+// static
+Quad Quad::RenderPassQuad(RenderPassId id) {
+  Quad quad;
+  quad.material = DrawQuad::RENDER_PASS;
+  quad.render_pass_id = id;
+  return quad;
+}
+
 void AddSurfaceQuad(RenderPass* pass,
                     const gfx::Size& surface_size,
                     float opacity,
                     SurfaceId surface_id) {
   gfx::Transform layer_to_target_transform;
   gfx::Size layer_bounds = surface_size;
   gfx::Rect visible_layer_rect = gfx::Rect(surface_size);
   gfx::Rect clip_rect = gfx::Rect(surface_size);
   bool is_clipped = false;
   SkXfermode::Mode blend_mode = SkXfermode::kSrcOver_Mode;
@@ skipping 95 matching lines @@
 
   for (size_t i = 0; i < passes->size(); ++i) {
     SCOPED_TRACE(base::StringPrintf("Pass number %" PRIuS, i));
     RenderPass* pass = (*passes)[i].get();
     TestPassMatchesExpectations(expected_passes[i], pass);
   }
 }
 
 }  // namespace test
 }  // namespace cc