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

cc/output/begin_frame_args.h

Index: cc/output/begin_frame_args.h
diff --git a/cc/output/begin_frame_args.h b/cc/output/begin_frame_args.h
index 274963103ca4bb0290c3b1ae897235b26b5e8a24..c8c7b2f227761660064a916e2a91a1c655580fcd 100644
--- a/cc/output/begin_frame_args.h
+++ b/cc/output/begin_frame_args.h
@@ -5,9 +5,10 @@
 #ifndef CC_OUTPUT_BEGIN_FRAME_ARGS_H_
 #define CC_OUTPUT_BEGIN_FRAME_ARGS_H_
 
+#include <memory>
+
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "cc/base/cc_export.h"
@@ -83,7 +84,7 @@ struct CC_EXPORT BeginFrameArgs {
 
   bool IsValid() const { return interval >= base::TimeDelta(); }
 
-  scoped_ptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
+  std::unique_ptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
   void AsValueInto(base::trace_event::TracedValue* dict) const;
 
   void ToProtobuf(proto::BeginFrameArgs* proto) const;