Don't update Media.EME.KeySystemSupport UMA for unprefixed EME

media/base/key_systems.h

 // 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.
 
 #ifndef MEDIA_BASE_KEY_SYSTEMS_H_
 #define MEDIA_BASE_KEY_SYSTEMS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 34 matching lines @@
     const std::string& init_data_type);
 
 // Returns whether |key_system| is a real supported key system that can be
 // instantiated.
 // Abstract parent |key_system| strings will return false.
 // Call IsSupportedKeySystemWithMediaMimeType() to determine whether a
 // |key_system| supports a specific type of media or to check parent key
 // systems.
 MEDIA_EXPORT bool IsConcreteSupportedKeySystem(const std::string& key_system);
 
-// Returns whether |key_sytem| supports the specified media type and codec(s).
+// Returns whether |key_system| supports the specified media type and codec(s).
+// |reportToUma| should only be true for prefixed calls.
 MEDIA_EXPORT bool IsSupportedKeySystemWithMediaMimeType(
     const std::string& mime_type,
     const std::vector<std::string>& codecs,
-    const std::string& key_system);
+    const std::string& key_system,
+    bool reportToUma);
 
 // Returns a name for |key_system| suitable to UMA logging.
 MEDIA_EXPORT std::string GetKeySystemNameForUMA(const std::string& key_system);
 
 // Returns whether AesDecryptor can be used for the given |concrete_key_system|.
 MEDIA_EXPORT bool CanUseAesDecryptor(const std::string& concrete_key_system);
 
 #if defined(ENABLE_PEPPER_CDMS)
 // Returns the Pepper MIME type for |concrete_key_system|.
 // Returns empty string if |concrete_key_system| is unknown or not Pepper-based.
 MEDIA_EXPORT std::string GetPepperType(
     const std::string& concrete_key_system);
 #endif
 
 #if defined(UNIT_TEST)
 // Helper functions to add container/codec types for testing purposes.
 MEDIA_EXPORT void AddContainerMask(const std::string& container, uint32 mask);
 MEDIA_EXPORT void AddCodecMask(const std::string& codec, uint32 mask);
 #endif  // defined(UNIT_TEST)
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_KEY_SYSTEMS_H_