Make cc::SurfaceId unguessable

cc/surfaces/surface_aggregator_perftest.cc

 // Copyright 2015 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/memory/ptr_util.h"
 #include "cc/debug/lap_timer.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/delegated_frame_data.h"
 #include "cc/quads/surface_draw_quad.h"
 #include "cc/quads/texture_draw_quad.h"
@@ skipping 31 matching lines @@
 
   void RunTest(int num_surfaces,
                int num_textures,
                float opacity,
                bool optimize_damage,
                bool full_damage,
                const std::string& name) {
     aggregator_.reset(new SurfaceAggregator(&manager_, resource_provider_.get(),
                                             optimize_damage));
     for (int i = 1; i <= num_surfaces; i++) {
-      factory_.Create(SurfaceId(i));
+      factory_.Create(SurfaceId(0, i));
       std::unique_ptr<RenderPass> pass(RenderPass::Create());
       std::unique_ptr<DelegatedFrameData> frame_data(new DelegatedFrameData);
 
       SharedQuadState* sqs = pass->CreateAndAppendSharedQuadState();
       for (int j = 0; j < num_textures; j++) {
         TransferableResource resource;
         resource.id = j;
         resource.is_software = true;
         frame_data->resource_list.push_back(resource);
 
@@ skipping 16 matching lines @@
                      gfx::Size(), premultiplied_alpha, uv_top_left,
                      uv_bottom_right, background_color, vertex_opacity, flipped,
                      nearest_neighbor, false);
       }
       sqs = pass->CreateAndAppendSharedQuadState();
       sqs->opacity = opacity;
       if (i > 1) {
         SurfaceDrawQuad* surface_quad =
             pass->CreateAndAppendDrawQuad<SurfaceDrawQuad>();
         surface_quad->SetNew(sqs, gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1),
-                             SurfaceId(i - 1));
+                             SurfaceId(0, i - 1));
       }
 
       frame_data->render_pass_list.push_back(std::move(pass));
       std::unique_ptr<CompositorFrame> frame(new CompositorFrame);
       frame->delegated_frame_data = std::move(frame_data);
-      factory_.SubmitCompositorFrame(SurfaceId(i), std::move(frame),
+      factory_.SubmitCompositorFrame(SurfaceId(0, i), std::move(frame),
                                      SurfaceFactory::DrawCallback());
     }
 
-    factory_.Create(SurfaceId(num_surfaces + 1));
+    factory_.Create(SurfaceId(0, num_surfaces + 1));
     timer_.Reset();
     do {
       std::unique_ptr<RenderPass> pass(RenderPass::Create());
       std::unique_ptr<DelegatedFrameData> frame_data(new DelegatedFrameData);
 
       SharedQuadState* sqs = pass->CreateAndAppendSharedQuadState();
       SurfaceDrawQuad* surface_quad =
           pass->CreateAndAppendDrawQuad<SurfaceDrawQuad>();
       surface_quad->SetNew(sqs, gfx::Rect(0, 0, 100, 100),
-                           gfx::Rect(0, 0, 100, 100), SurfaceId(num_surfaces));
+                           gfx::Rect(0, 0, 100, 100),
+                           SurfaceId(0, num_surfaces));
 
       if (full_damage)
         pass->damage_rect = gfx::Rect(0, 0, 100, 100);
       else
         pass->damage_rect = gfx::Rect(0, 0, 1, 1);
 
       frame_data->render_pass_list.push_back(std::move(pass));
       std::unique_ptr<CompositorFrame> frame(new CompositorFrame);
       frame->delegated_frame_data = std::move(frame_data);
-      factory_.SubmitCompositorFrame(SurfaceId(num_surfaces + 1),
+      factory_.SubmitCompositorFrame(SurfaceId(0, num_surfaces + 1),
                                      std::move(frame),
                                      SurfaceFactory::DrawCallback());
 
       std::unique_ptr<CompositorFrame> aggregated =
-          aggregator_->Aggregate(SurfaceId(num_surfaces + 1));
+          aggregator_->Aggregate(SurfaceId(0, num_surfaces + 1));
       timer_.NextLap();
     } while (!timer_.HasTimeLimitExpired());
 
     perf_test::PrintResult("aggregator_speed", "", name, timer_.LapsPerSecond(),
                            "runs/s", true);
 
-    factory_.Destroy(SurfaceId(num_surfaces + 1));
+    factory_.Destroy(SurfaceId(0, num_surfaces + 1));
     for (int i = 1; i <= num_surfaces; i++)
-      factory_.Destroy(SurfaceId(i));
+      factory_.Destroy(SurfaceId(0, i));
   }
 
  protected:
   SurfaceManager manager_;
   EmptySurfaceFactoryClient empty_client_;
   SurfaceFactory factory_;
   FakeOutputSurfaceClient output_surface_client_;
   std::unique_ptr<OutputSurface> output_surface_;
   std::unique_ptr<SharedBitmapManager> shared_bitmap_manager_;
   std::unique_ptr<ResourceProvider> resource_provider_;
@@ skipping 24 matching lines @@
 TEST_F(SurfaceAggregatorPerfTest, FewSurfacesDamageCalc) {
   RunTest(3, 1000, 1.f, true, true, "few_surfaces_damage_calc");
 }
 
 TEST_F(SurfaceAggregatorPerfTest, FewSurfacesAggregateDamaged) {
   RunTest(3, 1000, 1.f, true, false, "few_surfaces_aggregate_damaged");
 }
 
 }  // namespace
 }  // namespace cc