Add a convenience typedef LazyInstance<T>::Leaky to avoid repeating T.

base/debug/trace_event.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/debug/trace_event.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 45 matching lines @@
   "__metadata",
 };
 // The enabled flag is char instead of bool so that the API can be used from C.
 unsigned char g_category_enabled[TRACE_EVENT_MAX_CATEGORIES] = { 0 };
 const int g_category_already_shutdown = 0;
 const int g_category_categories_exhausted = 1;
 const int g_category_metadata = 2;
 int g_category_index = 3; // skip initial 3 categories
 
 // The most-recently captured name of the current thread
-LazyInstance<ThreadLocalPointer<const char>,
-             LeakyLazyInstanceTraits<ThreadLocalPointer<const char> > >
+LazyInstance<ThreadLocalPointer<const char> >::Leaky
     g_current_thread_name = LAZY_INSTANCE_INITIALIZER;
 
 void AppendValueAsJSON(unsigned char type,
                        TraceEvent::TraceValue value,
                        std::string* out) {
   std::string::size_type start_pos;
   switch (type) {
     case TRACE_VALUE_TYPE_BOOL:
       *out += value.as_bool ? "true" : "false";
       break;
@@ skipping 707 matching lines @@
         TRACE_EVENT_PHASE_END,
         p_data_->category_enabled,
         p_data_->name, kNoEventId,
         kZeroNumArgs, NULL, NULL, NULL,
         p_data_->threshold_begin_id, p_data_->threshold,
         TRACE_EVENT_FLAG_NONE);
   }
 }
 
 }  // namespace trace_event_internal