Move StartsWith[ASCII] to base namespace.

media/base/key_systems.cc

 // Copyright 2013 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 "media/base/key_systems.h"
 
 
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 656 matching lines @@
     const std::string& key_system,
     EmeMediaType media_type,
     const std::string& container_mime_type,
     const std::vector<std::string>& codecs) const {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   // Make sure the container matches |media_type|.
   SupportedCodecs media_type_codec_mask = EME_CODEC_NONE;
   switch (media_type) {
     case EmeMediaType::AUDIO:
-      if (!StartsWithASCII(container_mime_type, "audio/", true))
+      if (!base::StartsWithASCII(container_mime_type, "audio/", true))
         return EmeConfigRule::NOT_SUPPORTED;
       media_type_codec_mask = audio_codec_mask_;
       break;
     case EmeMediaType::VIDEO:
-      if (!StartsWithASCII(container_mime_type, "video/", true))
+      if (!base::StartsWithASCII(container_mime_type, "video/", true))
         return EmeConfigRule::NOT_SUPPORTED;
       media_type_codec_mask = video_codec_mask_;
       break;
   }
 
   // Look up the key system's supported codecs.
   KeySystemInfoMap::const_iterator key_system_iter =
       concrete_key_system_map_.find(key_system);
   if (key_system_iter == concrete_key_system_map_.end()) {
     NOTREACHED();
@@ skipping 238 matching lines @@
 }
 
 MEDIA_EXPORT void AddCodecMask(
     EmeMediaType media_type,
     const std::string& codec,
     uint32 mask) {
   KeySystemsImpl::GetInstance()->AddCodecMask(media_type, codec, mask);
 }
 
 }  // namespace media