Add cc::SharedBitmap::shared_memory_handle()

cc/test/test_shared_bitmap_manager.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/test/test_shared_bitmap_manager.h"
 
 #include <stdint.h>
 
 #include "base/memory/ptr_util.h"
 #include "base/memory/shared_memory.h"
 
 namespace cc {
 
 namespace {
+
 class OwnedSharedBitmap : public SharedBitmap {
  public:
   OwnedSharedBitmap(std::unique_ptr<base::SharedMemory> shared_memory,
                     const SharedBitmapId& id)
       : SharedBitmap(static_cast<uint8_t*>(shared_memory->memory()), id),
         shared_memory_(std::move(shared_memory)) {}
 
   ~OwnedSharedBitmap() override {}
 
+  // SharedBitmap:
+  base::SharedMemoryHandle GetSharedMemoryHandle() const override {
+    return shared_memory_->handle();
+  }
+
  private:
   std::unique_ptr<base::SharedMemory> shared_memory_;
 };
 
+class UnownedSharedBitmap : public SharedBitmap {
+ public:
+  UnownedSharedBitmap(uint8_t* pixels, const SharedBitmapId& id)
+      : SharedBitmap(pixels, id) {}
+
+  // SharedBitmap:
+  base::SharedMemoryHandle GetSharedMemoryHandle() const override {
+    return base::SharedMemoryHandle();
+  }
+};
+
 }  // namespace
 
 TestSharedBitmapManager::TestSharedBitmapManager() {}
 
 TestSharedBitmapManager::~TestSharedBitmapManager() {}
 
 std::unique_ptr<SharedBitmap> TestSharedBitmapManager::AllocateSharedBitmap(
     const gfx::Size& size) {
   base::AutoLock lock(lock_);
   std::unique_ptr<base::SharedMemory> memory(new base::SharedMemory);
   memory->CreateAndMapAnonymous(size.GetArea() * 4);
   SharedBitmapId id = SharedBitmap::GenerateId();
   bitmap_map_[id] = memory.get();
   return base::MakeUnique<OwnedSharedBitmap>(std::move(memory), id);
 }
 
 std::unique_ptr<SharedBitmap> TestSharedBitmapManager::GetSharedBitmapFromId(
     const gfx::Size&,
     const SharedBitmapId& id) {
   base::AutoLock lock(lock_);
   if (bitmap_map_.find(id) == bitmap_map_.end())
     return nullptr;
   uint8_t* pixels = static_cast<uint8_t*>(bitmap_map_[id]->memory());
-  return base::MakeUnique<SharedBitmap>(pixels, id);
+  return base::MakeUnique<UnownedSharedBitmap>(pixels, id);
 }
 
 }  // namespace cc