Clean up a few more unused globals.

content/renderer/media/crypto/key_systems.cc

Index: content/renderer/media/crypto/key_systems.cc
diff --git a/content/renderer/media/crypto/key_systems.cc b/content/renderer/media/crypto/key_systems.cc
index 4ce61227050c40d75b45f2aa96d139bfc4318eb5..5b6397145a6bc2a857c500b18841bd9a436a555c 100644
--- a/content/renderer/media/crypto/key_systems.cc
+++ b/content/renderer/media/crypto/key_systems.cc
@@ -25,18 +25,19 @@ static std::string ToASCIIOrEmpty(const WebKit::WebString& string) {
   return IsStringASCII(string) ? UTF16ToASCII(string) : std::string();
 }
 
-static const char kClearKeyKeySystem[] = "webkit-org.w3.clearkey";
-
-static const char kAudioWebM[] = "audio/webm";
-static const char kVideoWebM[] = "video/webm";
-static const char kVorbis[] = "vorbis";
-static const char kVorbisVP8[] = "vorbis,vp8,vp8.0";
-
-static const char kAudioMp4[] = "audio/mp4";
-static const char kVideoMp4[] = "video/mp4";
-static const char kMp4a[] = "mp4a";
-static const char kAvc1[] = "avc1";
-static const char kMp4aAvc1[] = "mp4a,avc1";
+const char kClearKeyKeySystem[] = "webkit-org.w3.clearkey";
+
+const char kAudioWebM[] = "audio/webm";
+const char kVideoWebM[] = "video/webm";
+const char kVorbis[] = "vorbis";
+const char kVorbisVP8[] = "vorbis,vp8,vp8.0";
+
+#if defined(USE_PROPRIETARY_CODECS)
+const char kAudioMp4[] = "audio/mp4";
+const char kVideoMp4[] = "video/mp4";
+const char kMp4a[] = "mp4a";
+const char kMp4aAvc1[] = "mp4a,avc1";
+#endif  // defined(USE_PROPRIETARY_CODECS)
 
 static void AddClearKey(std::vector<KeySystemInfo>* concrete_key_systems) {
   KeySystemInfo info(kClearKeyKeySystem);