Kills TraceTicks, which was functionally the same as TimeTicks

base/trace_event/trace_event_impl.cc

 // Copyright (c) 2012 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 "base/trace_event/trace_event_impl.h"
 
 #include "base/format_macros.h"
 #include "base/json/string_escape.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 57 matching lines @@
   for (int i = 0; i < kTraceMaxNumArgs; ++i) {
     arg_names_[i] = other.arg_names_[i];
     arg_types_[i] = other.arg_types_[i];
     arg_values_[i] = other.arg_values_[i];
     convertable_values_[i] = other.convertable_values_[i];
   }
 }
 
 void TraceEvent::Initialize(
     int thread_id,
-    TraceTicks timestamp,
+    TimeTicks timestamp,
     ThreadTicks thread_timestamp,
     char phase,
     const unsigned char* category_group_enabled,
     const char* name,
     unsigned long long id,
     unsigned long long context_id,
     unsigned long long bind_id,
     int num_args,
     const char** arg_names,
     const unsigned char* arg_types,
@@ skipping 77 matching lines @@
 
 void TraceEvent::Reset() {
   // Only reset fields that won't be initialized in Initialize(), or that may
   // hold references to other objects.
   duration_ = TimeDelta::FromInternalValue(-1);
   parameter_copy_storage_ = NULL;
   for (int i = 0; i < kTraceMaxNumArgs; ++i)
     convertable_values_[i] = NULL;
 }
 
-void TraceEvent::UpdateDuration(const TraceTicks& now,
+void TraceEvent::UpdateDuration(const TimeTicks& now,
                                 const ThreadTicks& thread_now) {
   DCHECK_EQ(duration_.ToInternalValue(), -1);
   duration_ = now - timestamp_;
 
   // |thread_timestamp_| can be empty if the thread ticks clock wasn't
   // initialized when it was recorded.
   if (thread_timestamp_ != ThreadTicks())
     thread_duration_ = thread_now - thread_timestamp_;
 }
 
@@ skipping 216 matching lines @@
         AppendValueAsJSON(arg_types_[i], arg_values_[i], &value_as_text);
 
       *out << value_as_text;
     }
     *out << "}";
   }
 }
 
 }  // namespace trace_event
 }  // namespace base