LoadTiming in net part 7: Hooking it all up

content/common/inter_process_time_ticks_converter.cc

 // Copyright (c) 2011 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 "content/common/inter_process_time_ticks_converter.h"
 
 #include "base/logging.h"
 
 namespace content {
 
@@ skipping 16 matching lines @@
   }
   // Set up scaling factors, and then deduce shift.
   numerator_ = target_range;
   denominator_ = source_range;
   // Find out what we need to shift by to make this really work.
   offset_ = local_lower_bound.value_ - Convert(remote_lower_bound.value_);
   DCHECK_GE(local_upper_bound.value_, Convert(remote_upper_bound.value_));
 }
 
 LocalTimeTicks InterProcessTimeTicksConverter::ToLocalTimeTicks(
-    const RemoteTimeTicks& remote_ms) {
+    const RemoteTimeTicks& remote_ms) const {
+  if (!remote_ms.value_)
+    return LocalTimeTicks(0);
   DCHECK_LE(remote_lower_bound_, remote_ms.value_);
   DCHECK_GE(remote_upper_bound_, remote_ms.value_);
   RemoteTimeDelta remote_delta = remote_ms - remote_lower_bound_;
   return LocalTimeTicks(remote_lower_bound_ + offset_ +
                         ToLocalTimeDelta(remote_delta).value_);
 }
 
 LocalTimeDelta InterProcessTimeTicksConverter::ToLocalTimeDelta(
-    const RemoteTimeDelta& remote_delta) {
+    const RemoteTimeDelta& remote_delta) const {
   DCHECK_GE(remote_upper_bound_, remote_lower_bound_ + remote_delta.value_);
   return LocalTimeDelta(Convert(remote_delta.value_));
 }
 
-int64 InterProcessTimeTicksConverter::Convert(int64 value) {
+int64 InterProcessTimeTicksConverter::Convert(int64 value) const {
   if (value <= 0) {
     return value;
   }
   return numerator_ * value / denominator_;
 }
 
 }  // namespace content