cc: Remove all blimp code from cc.

cc/proto/base_conversions.cc

Index: cc/proto/base_conversions.cc
diff --git a/cc/proto/base_conversions.cc b/cc/proto/base_conversions.cc
deleted file mode 100644
index 119903b2856db9ce8a1b68ab16fb8dd600357f21..0000000000000000000000000000000000000000
--- a/cc/proto/base_conversions.cc
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2016 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/proto/base_conversions.h"
-
-namespace base {
-class TimeDelta;
-}
-
-namespace cc {
-
-int64_t TimeTicksToProto(base::TimeTicks ticks) {
-  base::TimeDelta diff = ticks - base::TimeTicks::UnixEpoch();
-  return diff.InMicroseconds();
-}
-
-CC_EXPORT base::TimeTicks ProtoToTimeTicks(int64_t ticks) {
-  base::TimeDelta diff = base::TimeDelta::FromMicroseconds(ticks);
-  return base::TimeTicks::UnixEpoch() + diff;
-}
-
-}  // namespace cc