Make cc::CompositorFrames movable [Part 1 of 2]

cc/output/delegating_renderer.cc

Index: cc/output/delegating_renderer.cc
diff --git a/cc/output/delegating_renderer.cc b/cc/output/delegating_renderer.cc
index c063c7f608dfbfdbda048ebc7f942af291395b9b..4e3eaedf5560ea67b4bd70fc995a6d7c5a8c7e0b 100644
--- a/cc/output/delegating_renderer.cc
+++ b/cc/output/delegating_renderer.cc
@@ -101,10 +101,10 @@ void DelegatingRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
 
 void DelegatingRenderer::SwapBuffers(const CompositorFrameMetadata& metadata) {
   TRACE_EVENT0("cc,benchmark", "DelegatingRenderer::SwapBuffers");
-  CompositorFrame compositor_frame;
-  compositor_frame.metadata = metadata;
-  compositor_frame.delegated_frame_data = std::move(delegated_frame_data_);
-  output_surface_->SwapBuffers(&compositor_frame);
+  std::unique_ptr<CompositorFrame> compositor_frame(CompositorFrame::Create());
+  compositor_frame->metadata = metadata;
+  compositor_frame->delegated_frame_data = std::move(delegated_frame_data_);
+  output_surface_->SwapBuffers(std::move(compositor_frame));
 }
 
 void DelegatingRenderer::ReceiveSwapBuffersAck(