Enable cpplint and fix cpplint errors in webrtc/*audio

webrtc/common_audio/vad/vad_sp_unittest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include <stdlib.h>
 
 #include "webrtc/common_audio/vad/vad_unittest.h"
 #include "webrtc/test/gtest.h"
 #include "webrtc/typedefs.h"
 
 extern "C" {
 #include "webrtc/common_audio/vad/vad_core.h"
 #include "webrtc/common_audio/vad/vad_sp.h"
 }
 
-namespace {
+namespace webrtc {
+namespace test {
 
 TEST_F(VadTest, vad_sp) {
   VadInstT* self = reinterpret_cast<VadInstT*>(malloc(sizeof(VadInstT)));
   const size_t kMaxFrameLenSp = 960;  // Maximum frame length in this unittest.
   int16_t zeros[kMaxFrameLenSp] = { 0 };
   int32_t state[2] = { 0 };
   int16_t data_in[kMaxFrameLenSp];
   int16_t data_out[kMaxFrameLenSp];
 
   // We expect the first value to be 1600 as long as |frame_counter| is zero,
@@ skipping 31 matching lines @@
     for (int j = 0; j < kNumChannels; ++j) {
       // Use values both above and below initialized value.
       EXPECT_EQ(kReferenceMin[i], WebRtcVad_FindMinimum(self, value, j));
       EXPECT_EQ(kReferenceMin[i + 16], WebRtcVad_FindMinimum(self, 12000, j));
     }
     self->frame_counter++;
   }
 
   free(self);
 }
-}  // namespace
+}  // namespace test
+}  // namespace webrtc