Remove remaining uses of KeySystemInfo and InitDataTypeMask

chrome/renderer/media/chrome_key_systems.h

Index: chrome/renderer/media/chrome_key_systems.h
diff --git a/chrome/renderer/media/chrome_key_systems.h b/chrome/renderer/media/chrome_key_systems.h
index ab1be5041ced22d35159298018c9a25b9bd69106..3e82ee70e2b787b703b4fe76fe886f45d2f59830 100644
--- a/chrome/renderer/media/chrome_key_systems.h
+++ b/chrome/renderer/media/chrome_key_systems.h
@@ -9,16 +9,9 @@
 #include <vector>
 
 namespace media {
-struct KeySystemInfo;
 class KeySystemProperties;
 }
 
-// DEPRECATED: Register the key systems supported by populating
-// |key_systems_info|.  TODO(halliwell): move all key systems to
-// KeySystemProperties API.
-void AddChromeKeySystemsInfo(
-    std::vector<media::KeySystemInfo>* key_systems_info);
-
 // Register the key systems supported by populating |key_systems_properties|.
 void AddChromeKeySystems(
     std::vector<std::unique_ptr<media::KeySystemProperties>>*