Add a new GetInstance() method for singleton classes, take 2.

media/filters/ffmpeg_glue.cc

Index: media/filters/ffmpeg_glue.cc
diff --git a/media/filters/ffmpeg_glue.cc b/media/filters/ffmpeg_glue.cc
index 6f637c3fa7337f388d39f84112caa397b3e81b89..663fff73eaa83cbc4f180f8a443899e203108ac2 100644
--- a/media/filters/ffmpeg_glue.cc
+++ b/media/filters/ffmpeg_glue.cc
@@ -16,7 +16,7 @@ media::FFmpegURLProtocol* ToProtocol(void* data) {
 // FFmpeg protocol interface.
 int OpenContext(URLContext* h, const char* filename, int flags) {
   media::FFmpegURLProtocol* protocol;
-  media::FFmpegGlue::get()->GetProtocol(filename, &protocol);
+  media::FFmpegGlue::GetInstance()->GetProtocol(filename, &protocol);
   if (!protocol)
     return AVERROR_IO;
 
@@ -145,6 +145,11 @@ FFmpegGlue::~FFmpegGlue() {
   av_lockmgr_register(NULL);
 }
 
+// static
+FFmpegGlue* FFmpegGlue::GetInstance() {
+  return Singleton<FFmpegGlue>::get();
+}
+
 std::string FFmpegGlue::AddProtocol(FFmpegURLProtocol* protocol) {
   AutoLock auto_lock(lock_);
   std::string key = GetProtocolKey(protocol);