Refactor embedded structures to top-level scope.

base/debug/activity_analyzer.h

 // 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.
 
 #ifndef BASE_DEBUG_ACTIVITY_ANALYZER_H_
 #define BASE_DEBUG_ACTIVITY_ANALYZER_H_
 
 #include <map>
 #include <memory>
 #include <set>
 
 #include "base/base_export.h"
 #include "base/debug/activity_tracker.h"
 
 namespace base {
 namespace debug {
 
 // This class provides analysis of data captured from a ThreadActivityTracker.
 // When created, it takes a snapshot of the data held by the tracker and
 // makes that information available to other code.
 class BASE_EXPORT ThreadActivityAnalyzer {
  public:
-  using Activity = ThreadActivityTracker::Activity;
-  using ActivitySnapshot = ThreadActivityTracker::ActivitySnapshot;
-
   // This class provides keys that uniquely identify a thread, even across
   // multiple processes.
   class ThreadKey {
    public:
     ThreadKey(int64_t pid, int64_t tid) : pid_(pid), tid_(tid) {}
 
     bool operator<(const ThreadKey& rhs) const {
       if (pid_ != rhs.pid_)
         return pid_ < rhs.pid_;
       return tid_ < rhs.tid_;
@@ skipping 114 matching lines @@
   // first/next iteration.
   AnalyzerMap::iterator analyzers_iterator_;
 
   DISALLOW_COPY_AND_ASSIGN(GlobalActivityAnalyzer);
 };
 
 }  // namespace debug
 }  // namespace base
 
 #endif  // BASE_DEBUG_ACTIVITY_ANALYZER_H_