Make cc::SurfaceId unguessable

cc/surfaces/surface_factory_unittest.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/surfaces/surface_factory.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 40 matching lines @@
  private:
   ReturnedResourceArray returned_resources_;
   BeginFrameSource* begin_frame_source_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSurfaceFactoryClient);
 };
 
 class SurfaceFactoryTest : public testing::Test {
  public:
   SurfaceFactoryTest()
-      : factory_(new SurfaceFactory(&manager_, &client_)), surface_id_(3) {
+      : factory_(new SurfaceFactory(&manager_, &client_)), surface_id_(0, 3) {
     factory_->Create(surface_id_);
   }
 
   ~SurfaceFactoryTest() override {
     if (!surface_id_.is_null())
       factory_->Destroy(surface_id_);
   }
 
   void SubmitCompositorFrameWithResources(ResourceId* resource_ids,
                                           size_t num_resource_ids) {
@@ skipping 310 matching lines @@
     SCOPED_TRACE("fourth frame, second unref");
     ResourceId expected_returned_ids[] = {12, 13};
     int expected_returned_counts[] = {2, 2};
     CheckReturnedResourcesMatchExpected(expected_returned_ids,
                                         expected_returned_counts,
                                         arraysize(expected_returned_counts));
   }
 }
 
 TEST_F(SurfaceFactoryTest, BlankNoIndexIncrement) {
-  SurfaceId surface_id(6);
+  SurfaceId surface_id(0, 6);
   factory_->Create(surface_id);
   Surface* surface = manager_.GetSurfaceForId(surface_id);
   ASSERT_NE(nullptr, surface);
   EXPECT_EQ(2, surface->frame_index());
   std::unique_ptr<CompositorFrame> frame(new CompositorFrame);
   frame->delegated_frame_data.reset(new DelegatedFrameData);
 
   factory_->SubmitCompositorFrame(surface_id, std::move(frame),
                                   SurfaceFactory::DrawCallback());
   EXPECT_EQ(2, surface->frame_index());
   factory_->Destroy(surface_id);
 }
 
 void DrawCallback(uint32_t* execute_count,
                   SurfaceDrawStatus* result,
                   SurfaceDrawStatus drawn) {
   *execute_count += 1;
   *result = drawn;
 }
 
 // Tests doing a DestroyAll before shutting down the factory;
 TEST_F(SurfaceFactoryTest, DestroyAll) {
-  SurfaceId id(7);
+  SurfaceId id(0, 7);
   factory_->Create(id);
 
   std::unique_ptr<DelegatedFrameData> frame_data(new DelegatedFrameData);
   TransferableResource resource;
   resource.id = 1;
   resource.mailbox_holder.texture_target = GL_TEXTURE_2D;
   frame_data->resource_list.push_back(resource);
   std::unique_ptr<CompositorFrame> frame(new CompositorFrame);
   frame->delegated_frame_data = std::move(frame_data);
   uint32_t execute_count = 0;
   SurfaceDrawStatus drawn = SurfaceDrawStatus::DRAW_SKIPPED;
 
   factory_->SubmitCompositorFrame(
       id, std::move(frame), base::Bind(&DrawCallback, &execute_count, &drawn));
 
   surface_id_ = SurfaceId();
   factory_->DestroyAll();
   EXPECT_EQ(1u, execute_count);
   EXPECT_EQ(SurfaceDrawStatus::DRAW_SKIPPED, drawn);
 }
 
 TEST_F(SurfaceFactoryTest, DestroySequence) {
-  SurfaceId id2(5);
+  SurfaceId id2(0, 5);
   factory_->Create(id2);
 
   manager_.RegisterSurfaceIdNamespace(0);
 
   // Check that waiting before the sequence is satisfied works.
   manager_.GetSurfaceForId(id2)
       ->AddDestructionDependency(SurfaceSequence(0, 4));
   factory_->Destroy(id2);
 
   std::unique_ptr<DelegatedFrameData> frame_data(new DelegatedFrameData);
@@ skipping 12 matching lines @@
   manager_.GetSurfaceForId(id2)
       ->AddDestructionDependency(SurfaceSequence(0, 6));
   factory_->Destroy(id2);
   DCHECK(!manager_.GetSurfaceForId(id2));
 }
 
 // Tests that Surface ID namespace invalidation correctly allows
 // Sequences to be ignored.
 TEST_F(SurfaceFactoryTest, InvalidIdNamespace) {
   uint32_t id_namespace = 9u;
-  SurfaceId id(5);
+  SurfaceId id(id_namespace, 5);
   factory_->Create(id);
 
   manager_.RegisterSurfaceIdNamespace(id_namespace);
   manager_.GetSurfaceForId(id)
       ->AddDestructionDependency(SurfaceSequence(id_namespace, 4));
   factory_->Destroy(id);
 
   // Verify the dependency has prevented the surface from getting destroyed.
   EXPECT_TRUE(manager_.GetSurfaceForId(id));
 
   manager_.InvalidateSurfaceIdNamespace(id_namespace);
 
   // Verify that the invalidated namespace caused the unsatisfied sequence
   // to be ignored.
   EXPECT_FALSE(manager_.GetSurfaceForId(id));
 }
 
 TEST_F(SurfaceFactoryTest, DestroyCycle) {
-  SurfaceId id2(5);
+  SurfaceId id2(0, 5);
   factory_->Create(id2);
 
   manager_.RegisterSurfaceIdNamespace(0);
 
   manager_.GetSurfaceForId(id2)
       ->AddDestructionDependency(SurfaceSequence(0, 4));
 
   // Give id2 a frame that references surface_id_.
   {
     std::unique_ptr<RenderPass> render_pass(RenderPass::Create());
@@ skipping 87 matching lines @@
 
   factory_->Destroy(surface_id_);
   surface_id_ = SurfaceId();
   EXPECT_TRUE(called1);
   EXPECT_TRUE(called2);
   EXPECT_TRUE(called3);
 }
 
 }  // namespace
 }  // namespace cc