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

cc/output/compositor_frame_ack.h

Index: cc/output/compositor_frame_ack.h
diff --git a/cc/output/compositor_frame_ack.h b/cc/output/compositor_frame_ack.h
index a4e161b3d8d43503366297e00427a760489e9415..55ca7f1ccb0ab3a0d8a0ec3d6706e3b342f02c06 100644
--- a/cc/output/compositor_frame_ack.h
+++ b/cc/output/compositor_frame_ack.h
@@ -5,8 +5,9 @@
 #ifndef CC_OUTPUT_COMPOSITOR_FRAME_ACK_H_
 #define CC_OUTPUT_COMPOSITOR_FRAME_ACK_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/gl_frame_data.h"
 #include "cc/resources/returned_resource.h"
@@ -19,7 +20,7 @@ class CC_EXPORT CompositorFrameAck {
   ~CompositorFrameAck();
 
   ReturnedResourceArray resources;
-  scoped_ptr<GLFrameData> gl_frame_data;
+  std::unique_ptr<GLFrameData> gl_frame_data;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CompositorFrameAck);