Move more metrics classes to metrics namespace.

base/threading/thread_restrictions.h

 // 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.
 
 #ifndef BASE_THREADING_THREAD_RESTRICTIONS_H_
 #define BASE_THREADING_THREAD_RESTRICTIONS_H_
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 
 // See comment at top of thread_checker.h
 #if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON))
 #define ENABLE_THREAD_RESTRICTIONS 1
 #else
 #define ENABLE_THREAD_RESTRICTIONS 0
 #endif
 
 class AcceleratedPresenter;
 class BrowserProcessImpl;
 class HistogramSynchronizer;
-class MetricsService;
 class NativeBackendKWallet;
 class ScopedAllowWaitForLegacyWebViewApi;
 class TestingAutomationProvider;
 
 namespace browser_sync {
 class NonFrontendDataTypeController;
 class UIModelWorker;
 }
 namespace cc {
 class CompletionEvent;
@@ skipping 22 matching lines @@
 namespace dbus {
 class Bus;
 }
 namespace disk_cache {
 class BackendImpl;
 class InFlightIO;
 }
 namespace media {
 class AudioOutputController;
 }
+namespace metrics {
+class MetricsService;
+}
 namespace mojo {
 namespace common {
 class WatcherThreadManager;
 }
 }
 namespace net {
 class FileStreamPosix;
 class FileStreamWin;
 namespace internal {
 class AddressTrackerLinux;
@@ skipping 142 matching lines @@
   friend class content::TextInputClientMac;       // http://crbug.com/121917
   friend class dbus::Bus;                         // http://crbug.com/125222
   friend class disk_cache::BackendImpl;           // http://crbug.com/74623
   friend class disk_cache::InFlightIO;            // http://crbug.com/74623
   friend class media::AudioOutputController;      // http://crbug.com/120973
   friend class net::FileStreamPosix;              // http://crbug.com/115067
   friend class net::FileStreamWin;                // http://crbug.com/115067
   friend class net::internal::AddressTrackerLinux;  // http://crbug.com/125097
   friend class ::AcceleratedPresenter;            // http://crbug.com/125391
   friend class ::BrowserProcessImpl;              // http://crbug.com/125207
-  friend class ::MetricsService;                  // http://crbug.com/124954
+  friend class metrics::MetricsService;           // http://crbug.com/124954
   friend class ::NativeBackendKWallet;            // http://crbug.com/125331
   // END USAGE THAT NEEDS TO BE FIXED.
 
 #if ENABLE_THREAD_RESTRICTIONS
   static bool SetWaitAllowed(bool allowed);
 #else
   static bool SetWaitAllowed(bool allowed) { return true; }
 #endif
 
   // Constructing a ScopedAllowWait temporarily allows waiting on the current
@@ skipping 11 matching lines @@
 
     DISALLOW_COPY_AND_ASSIGN(ScopedAllowWait);
   };
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ThreadRestrictions);
 };
 
 }  // namespace base
 
 #endif  // BASE_THREADING_THREAD_RESTRICTIONS_H_