Replace media::Limits struct with media::limits namespace and update documentation.

media/audio/win/audio_output_win_unittest.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 <windows.h>
 #include <mmsystem.h>
 
 #include "base/basictypes.h"
 #include "base/base_paths.h"
 #include "base/file_util.h"
@@ skipping 244 matching lines @@
   EXPECT_TRUE(NULL == audio_man->MakeAudioOutputStream(
       AudioParameters(fmt, CHANNEL_LAYOUT_UNSUPPORTED, 8000, 16, 256)));
   EXPECT_TRUE(NULL == audio_man->MakeAudioOutputStream(
       AudioParameters(fmt, CHANNEL_LAYOUT_STEREO, -8000, 16, 256)));
   EXPECT_TRUE(NULL == audio_man->MakeAudioOutputStream(
       AudioParameters(fmt, CHANNEL_LAYOUT_MONO, 8000, 16, -100)));
   EXPECT_TRUE(NULL == audio_man->MakeAudioOutputStream(
       AudioParameters(fmt, CHANNEL_LAYOUT_MONO, 8000, 16, 0)));
   EXPECT_TRUE(NULL == audio_man->MakeAudioOutputStream(
       AudioParameters(fmt, CHANNEL_LAYOUT_MONO, 8000, 16,
-                      media::Limits::kMaxSamplesPerPacket + 1)));
+                      media::limits::kMaxSamplesPerPacket + 1)));
 }
 
 // Test that it can be opened and closed.
 TEST(WinAudioTest, PCMWaveStreamOpenAndClose) {
   if (IsRunningHeadless())
     return;
   AudioManager* audio_man = AudioManager::GetAudioManager();
   ASSERT_TRUE(NULL != audio_man);
   if (!audio_man->HasAudioOutputDevices())
     return;
@@ skipping 467 matching lines @@
 
   oas->Start(&source);
 
   ::WaitForSingleObject(thread, INFINITE);
   ::CloseHandle(thread);
   delete sockets[1];
 
   oas->Stop();
   oas->Close();
 }