Move StringToUpperASCII and LowerCaseEqualsASCII to the base namespace

media/base/audio_video_metadata_extractor.cc

Index: media/base/audio_video_metadata_extractor.cc
diff --git a/media/base/audio_video_metadata_extractor.cc b/media/base/audio_video_metadata_extractor.cc
index fd666f6c919448ccd386a91e702fa1d9fc5ba101..bde703ae6209346a5bdd865990d6189d6236a51b 100644
--- a/media/base/audio_video_metadata_extractor.cc
+++ b/media/base/audio_video_metadata_extractor.cc
@@ -23,7 +23,7 @@ void OnError(bool* succeeded) {
 // Returns true if the |tag| matches |expected_key|.
 bool ExtractString(AVDictionaryEntry* tag, const char* expected_key,
                    std::string* destination) {
-  if (!LowerCaseEqualsASCII(std::string(tag->key), expected_key))
+  if (!base::LowerCaseEqualsASCII(tag->key, expected_key))
     return false;
 
   if (destination->empty())
@@ -35,7 +35,7 @@ bool ExtractString(AVDictionaryEntry* tag, const char* expected_key,
 // Returns true if the |tag| matches |expected_key|.
 bool ExtractInt(AVDictionaryEntry* tag, const char* expected_key,
                 int* destination) {
-  if (!LowerCaseEqualsASCII(std::string(tag->key), expected_key))
+  if (!base::LowerCaseEqualsASCII(tag->key, expected_key))
     return false;
 
   int temporary = -1;