Add SurfaceReference class.

cc/ipc/struct_traits_unittest.cc

 // Copyright 2016 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/input/selection.h"
 #include "cc/ipc/traits_test_service.mojom.h"
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/quads/render_pass.h"
 #include "cc/quads/render_pass_draw_quad.h"
@@ skipping 77 matching lines @@
       const SharedQuadState& s,
       const EchoSharedQuadStateCallback& callback) override {
     callback.Run(s);
   }
 
   void EchoSurfaceId(const SurfaceId& s,
                      const EchoSurfaceIdCallback& callback) override {
     callback.Run(s);
   }
 
+  void EchoSurfaceReference(
+      const SurfaceReference& s,
+      const EchoSurfaceReferenceCallback& callback) override {
+    callback.Run(s);
+  }
+
   void EchoSurfaceSequence(
       const SurfaceSequence& s,
       const EchoSurfaceSequenceCallback& callback) override {
     callback.Run(s);
   }
 
   void EchoTransferableResource(
       const TransferableResource& t,
       const EchoTransferableResourceCallback& callback) override {
     callback.Run(t);
@@ skipping 658 matching lines @@
   static LocalFrameId local_frame_id(0xfbadbeef,
                                      base::UnguessableToken::Create());
   SurfaceId input(frame_sink_id, local_frame_id);
   mojom::TraitsTestServicePtr proxy = GetTraitsTestProxy();
   SurfaceId output;
   proxy->EchoSurfaceId(input, &output);
   EXPECT_EQ(frame_sink_id, output.frame_sink_id());
   EXPECT_EQ(local_frame_id, output.local_frame_id());
 }
 
+TEST_F(StructTraitsTest, SurfaceReference) {
+  const SurfaceId parent_id(
+      FrameSinkId(2016, 1234),
+      LocalFrameId(0xfbadbeef, base::UnguessableToken::Deserialize(123, 456)));
+  const SurfaceId child_id(
+      FrameSinkId(1111, 9999),
+      LocalFrameId(0xabcdabcd, base::UnguessableToken::Deserialize(333, 333)));
+  const SurfaceReference input(parent_id, child_id);
+
+  mojom::TraitsTestServicePtr proxy = GetTraitsTestProxy();
+  SurfaceReference output;
+  proxy->EchoSurfaceReference(input, &output);
+  EXPECT_EQ(parent_id, output.parent_id());
+  EXPECT_EQ(child_id, output.child_id());
+}
+
 TEST_F(StructTraitsTest, SurfaceSequence) {
   const FrameSinkId frame_sink_id(2016, 1234);
   const uint32_t sequence = 0xfbadbeef;
   SurfaceSequence input(frame_sink_id, sequence);
   mojom::TraitsTestServicePtr proxy = GetTraitsTestProxy();
   SurfaceSequence output;
   proxy->EchoSurfaceSequence(input, &output);
   EXPECT_EQ(frame_sink_id, output.frame_sink_id);
   EXPECT_EQ(sequence, output.sequence);
 }
@@ skipping 128 matching lines @@
   EXPECT_EQ(u_plane_resource_id, out_quad->u_plane_resource_id());
   EXPECT_EQ(v_plane_resource_id, out_quad->v_plane_resource_id());
   EXPECT_EQ(a_plane_resource_id, out_quad->a_plane_resource_id());
   EXPECT_EQ(color_space, out_quad->color_space);
   EXPECT_EQ(resource_offset, out_quad->resource_offset);
   EXPECT_EQ(resource_multiplier, out_quad->resource_multiplier);
   EXPECT_EQ(bits_per_channel, out_quad->bits_per_channel);
 }
 
 }  // namespace cc