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

cc/surfaces/display_unittest.cc

Index: cc/surfaces/display_unittest.cc
diff --git a/cc/surfaces/display_unittest.cc b/cc/surfaces/display_unittest.cc
index 3a7ede8e5425ab48ed51136cf85a2096cc73b715..5b38d20edaf4b29770659044d389ad725f211404 100644
--- a/cc/surfaces/display_unittest.cc
+++ b/cc/surfaces/display_unittest.cc
@@ -386,7 +386,7 @@ TEST_F(DisplayTest, DisplayDamaged) {
 
     // Latency info from previous frame should be sent now.
     EXPECT_EQ(1u,
-              output_surface_->last_sent_frame().metadata.latency_info.size());
+              output_surface_->last_sent_frame()->metadata.latency_info.size());
   }
 
   {
@@ -412,7 +412,7 @@ TEST_F(DisplayTest, DisplayDamaged) {
     EXPECT_EQ(gfx::Rect(0, 0, 100, 100),
               software_output_device_->damage_rect());
     EXPECT_EQ(0u,
-              output_surface_->last_sent_frame().metadata.latency_info.size());
+              output_surface_->last_sent_frame()->metadata.latency_info.size());
   }
 
   factory_.Destroy(surface_id);