Introducing gpu::CommandBufferId as a distinct, IdType<...>-based type.

cc/resources/resource_provider_unittest.cc

Index: cc/resources/resource_provider_unittest.cc
diff --git a/cc/resources/resource_provider_unittest.cc b/cc/resources/resource_provider_unittest.cc
index a54e1254bd77f74b405bac68d7f531f714452485..e97173445fc159760559318a77ee16363c72c1aa 100644
--- a/cc/resources/resource_provider_unittest.cc
+++ b/cc/resources/resource_provider_unittest.cc
@@ -121,7 +121,8 @@ class TextureStateTrackingContext : public TestWebGraphicsContext3D {
 
   void genSyncToken(GLuint64 fence_sync, GLbyte* sync_token) override {
     gpu::SyncToken sync_token_data(gpu::CommandBufferNamespace::GPU_IO, 0,
-                                   0x123, fence_sync);
+                                   gpu::CommandBufferId::FromUnsafeValue(0x123),
+                                   fence_sync);
     sync_token_data.SetVerifyFlush();
     memcpy(sync_token, &sync_token_data, sizeof(sync_token_data));
   }
@@ -199,7 +200,8 @@ class ResourceProviderContext : public TestWebGraphicsContext3D {
 
   void genSyncToken(GLuint64 fence_sync, GLbyte* sync_token) override {
     gpu::SyncToken sync_token_data(gpu::CommandBufferNamespace::GPU_IO, 0,
-                                   0x123, fence_sync);
+                                   gpu::CommandBufferId::FromUnsafeValue(0x123),
+                                   fence_sync);
     sync_token_data.SetVerifyFlush();
     // Commit the produceTextureCHROMIUM calls at this point, so that
     // they're associated with the sync point.
@@ -2835,7 +2837,8 @@ class ResourceProviderTestTextureMailboxGLFilters
         use_image_texture_targets_));
 
     unsigned texture_id = 1;
-    gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0, 0x12,
+    gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0,
+                              gpu::CommandBufferId::FromUnsafeValue(0x12),
                               0x34);
     unsigned target = GL_TEXTURE_2D;
     const GLuint64 current_fence_sync = context->GetNextFenceSync();
@@ -2978,7 +2981,8 @@ TEST_P(ResourceProviderTest, TextureMailbox_GLTextureExternalOES) {
       gpu_memory_buffer_manager_.get(), NULL, 0, 1,
       use_gpu_memory_buffer_resources_, use_image_texture_targets_));
 
-  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0, 0x12, 0x34);
+  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0,
+                            gpu::CommandBufferId::FromUnsafeValue(0x12), 0x34);
   const GLuint64 current_fence_sync = context->GetNextFenceSync();
   unsigned target = GL_TEXTURE_EXTERNAL_OES;
 
@@ -3047,7 +3051,8 @@ TEST_P(ResourceProviderTest,
       gpu_memory_buffer_manager_.get(), NULL, 0, 1,
       use_gpu_memory_buffer_resources_, use_image_texture_targets_));
 
-  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0, 0x12, 0x34);
+  gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0,
+                            gpu::CommandBufferId::FromUnsafeValue(0x12), 0x34);
   const GLuint64 current_fence_sync = context->GetNextFenceSync();
   unsigned target = GL_TEXTURE_2D;