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

cc/layers/surface_layer_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 <set>
 #include <vector>
 
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 54 matching lines @@
 // Check that one surface can be referenced by multiple LayerTreeHosts, and
 // each will create its own SurfaceSequence that's satisfied on destruction.
 TEST_F(SurfaceLayerTest, MultipleFramesOneSurface) {
   SurfaceSequence blank_change;  // Receives sequence if commit doesn't happen.
 
   SurfaceId required_id;
   std::set<SurfaceSequence> required_seq;
   scoped_refptr<SurfaceLayer> layer(SurfaceLayer::Create(
       layer_settings_, base::Bind(&SatisfyCallback, &blank_change),
       base::Bind(&RequireCallback, &required_id, &required_seq)));
-  layer->SetSurfaceId(SurfaceId(1), 1.f, gfx::Size(1, 1));
+  layer->SetSurfaceId(SurfaceId::FromUnsafeValue(1), 1.f, gfx::Size(1, 1));
   layer_tree_host_->set_surface_id_namespace(1);
   layer_tree_host_->SetRootLayer(layer);
 
   scoped_ptr<FakeLayerTreeHost> layer_tree_host2 =
       FakeLayerTreeHost::Create(&fake_client_, &task_graph_runner_);
   scoped_refptr<SurfaceLayer> layer2(SurfaceLayer::Create(
       layer_settings_, base::Bind(&SatisfyCallback, &blank_change),
       base::Bind(&RequireCallback, &required_id, &required_seq)));
-  layer2->SetSurfaceId(SurfaceId(1), 1.f, gfx::Size(1, 1));
+  layer2->SetSurfaceId(SurfaceId::FromUnsafeValue(1), 1.f, gfx::Size(1, 1));
   layer_tree_host2->set_surface_id_namespace(2);
   layer_tree_host2->SetRootLayer(layer2);
 
   // Layers haven't been removed, so no sequence should be satisfied.
   EXPECT_TRUE(blank_change.is_null());
 
   SurfaceSequence expected1(1u, 1u);
   SurfaceSequence expected2(2u, 1u);
 
   layer_tree_host2->SetRootLayer(nullptr);
   layer_tree_host2.reset();
 
   // Layer was removed so sequence from second LayerTreeHost should be
   // satisfied.
   EXPECT_TRUE(blank_change == expected2);
 
   // Set of sequences that need to be satisfied should include sequences from
   // both trees.
-  EXPECT_TRUE(required_id == SurfaceId(1));
+  EXPECT_TRUE(required_id == SurfaceId::FromUnsafeValue(1));
   EXPECT_EQ(2u, required_seq.size());
   EXPECT_TRUE(required_seq.count(expected1));
   EXPECT_TRUE(required_seq.count(expected2));
 
   layer_tree_host_->SetRootLayer(nullptr);
   layer_tree_host_.reset();
 
   // Layer was removed so sequence from first LayerTreeHost should be
   // satisfied.
   EXPECT_TRUE(blank_change == expected1);
 
   // No more SurfaceSequences should have been generated that need to have be
   // satisfied.
   EXPECT_EQ(2u, required_seq.size());
 }
 
 // Check that SurfaceSequence is sent through swap promise.
 class SurfaceLayerSwapPromise : public LayerTreeTest {
  public:
   SurfaceLayerSwapPromise()
       : commit_count_(0), sequence_was_satisfied_(false) {}
 
   void BeginTest() override {
     layer_tree_host()->set_surface_id_namespace(1);
     layer_ = SurfaceLayer::Create(
         layer_settings(), base::Bind(&SatisfyCallback, &satisfied_sequence_),
         base::Bind(&RequireCallback, &required_id_, &required_set_));
-    layer_->SetSurfaceId(SurfaceId(1), 1.f, gfx::Size(1, 1));
+    layer_->SetSurfaceId(SurfaceId::FromUnsafeValue(1), 1.f, gfx::Size(1, 1));
 
     // Layer hasn't been added to tree so no SurfaceSequence generated yet.
     EXPECT_EQ(0u, required_set_.size());
 
     layer_tree_host()->SetRootLayer(layer_);
 
     // Should have SurfaceSequence from first tree.
     SurfaceSequence expected(1u, 1u);
-    EXPECT_TRUE(required_id_ == SurfaceId(1));
+    EXPECT_TRUE(required_id_ == SurfaceId::FromUnsafeValue(1));
     EXPECT_EQ(1u, required_set_.size());
     EXPECT_TRUE(required_set_.count(expected));
 
     gfx::Size bounds(100, 100);
     layer_tree_host()->SetViewportSize(bounds);
 
     blank_layer_ = SolidColorLayer::Create(layer_settings());
     blank_layer_->SetIsDrawable(true);
     blank_layer_->SetBounds(gfx::Size(10, 10));
 
@@ skipping 49 matching lines @@
       // after the layer was removed from the tree, and only once.
       EXPECT_EQ(1u, satisfied[0]);
       EXPECT_LE(1, commit_count_);
       EXPECT_FALSE(sequence_was_satisfied_);
       sequence_was_satisfied_ = true;
       EndTest();
     }
   }
 
   void AfterTest() override {
-    EXPECT_TRUE(required_id_ == SurfaceId(1));
+    EXPECT_TRUE(required_id_ == SurfaceId::FromUnsafeValue(1));
     EXPECT_EQ(1u, required_set_.size());
     // Sequence should have been satisfied through Swap, not with the
     // callback.
     EXPECT_TRUE(satisfied_sequence_.is_null());
   }
 };
 
 // TODO(jbauman): Reenable on single thread once http://crbug.com/421923 is
 // fixed.
 MULTI_THREAD_TEST_F(SurfaceLayerSwapPromiseWithDraw);
@@ skipping 20 matching lines @@
       case 2:
         layer_tree_host()->SetNeedsCommit();
         break;
       default:
         EndTest();
         break;
     }
   }
 
   void AfterTest() override {
-    EXPECT_TRUE(required_id_ == SurfaceId(1));
+    EXPECT_TRUE(required_id_ == SurfaceId::FromUnsafeValue(1));
     EXPECT_EQ(1u, required_set_.size());
     // Sequence should have been satisfied with the callback.
     EXPECT_TRUE(satisfied_sequence_ == SurfaceSequence(1u, 1u));
   }
 };
 
 MULTI_THREAD_TEST_F(SurfaceLayerSwapPromiseWithoutDraw);
 
 }  // namespace
 }  // namespace cc