Convert //cc from scoped_ptr to std::unique_ptr.

cc/test/fake_tile_manager.cc

Index: cc/test/fake_tile_manager.cc
diff --git a/cc/test/fake_tile_manager.cc b/cc/test/fake_tile_manager.cc
index 77b9b0dfbcf2d46359d3ad824ee22dc280a5e615..b76cd17654e9c6cd56977e9d4c5e7a46d3cd5579 100644
--- a/cc/test/fake_tile_manager.cc
+++ b/cc/test/fake_tile_manager.cc
@@ -54,13 +54,13 @@ class FakeTileTaskRunnerImpl : public TileTaskRunner, public TileTaskClient {
   }
 
   // Overridden from TileTaskClient:
-  scoped_ptr<RasterBuffer> AcquireBufferForRaster(
+  std::unique_ptr<RasterBuffer> AcquireBufferForRaster(
       const Resource* resource,
       uint64_t resource_content_id,
       uint64_t previous_content_id) override {
     return nullptr;
   }
-  void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) override {}
+  void ReleaseBufferForRaster(std::unique_ptr<RasterBuffer> buffer) override {}
 
  private:
   RasterTask::Vector completed_tasks_;