Adding gtest helpers for BeginFrameArgs.

cc/test/output_test_common.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/test/output_test_common.h"
 
 #include "base/time/time.h"
 #include "cc/output/begin_frame_args.h"
 #include "ui/gfx/frame_time.h"
 
@@ skipping 14 matching lines @@
 }
 
 BeginFrameArgs BeginFrameArgsCreateQuick(int64 frame_time,
                                          int64 deadline,
                                          int64 interval) {
   return BeginFrameArgs::Create(base::TimeTicks::FromInternalValue(frame_time),
                                 base::TimeTicks::FromInternalValue(deadline),
                                 base::TimeDelta::FromInternalValue(deadline));
 }
 
+bool operator==(BeginFrameArgs lhs, BeginFrameArgs rhs) {
+  return (lhs.frame_time == rhs.frame_time) && (lhs.deadline == rhs.deadline) &&
+         (lhs.interval == rhs.interval);
+}
+
+void PrintTo(const BeginFrameArgs& args, ::std::ostream* os) {
+  *os << "BeginFrameArgs(" << args.frame_time.ToInternalValue() << ", "
+      << args.deadline.ToInternalValue() << ", "
+      << args.interval.InMicroseconds() << "us)";
+}
+
 }  // namespace cc