Simplify/Cleanup MediaClient

media/base/media_client.h

Index: media/base/media_client.h
diff --git a/media/base/media_client.h b/media/base/media_client.h
index e5beb94ef94d2d5c747e5749fe12c690f7adcbae..f6b938b0dc02dcb0e27db80b87595c2b4f76374f 100644
--- a/media/base/media_client.h
+++ b/media/base/media_client.h
@@ -5,6 +5,7 @@
 #ifndef MEDIA_BASE_MEDIA_CLIENT_H_
 #define MEDIA_BASE_MEDIA_CLIENT_H_
 
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -30,20 +31,6 @@ MEDIA_EXPORT void SetMediaClient(MediaClient* media_client);
 MEDIA_EXPORT MediaClient* GetMediaClient();
 #endif
 
-struct MEDIA_EXPORT KeySystemInfoForUMA {
-  KeySystemInfoForUMA(const std::string& key_system,
-                      const std::string& key_system_name_for_uma);
-  ~KeySystemInfoForUMA();
-
-  // Concrete key system name;
-  std::string key_system;
-
-  // Display name for UMA reporting. For example, the display name for
-  // "org.w3.clearkey" is "ClearKey". When providing this value, make sure to
-  // update tools/metrics/histograms/histograms.xml.
-  std::string key_system_name_for_uma;
-};
-
 // A client interface for embedders (e.g. content/renderer) to provide
 // customized service.
 class MEDIA_EXPORT MediaClient {
@@ -51,15 +38,6 @@ class MEDIA_EXPORT MediaClient {
   MediaClient();
   virtual ~MediaClient();
 
-  // Provides UMA info for key systems that SHOULD be reported to UMA, no matter
-  // whether a key system is actually supported by this client or not. Only
-  // called once per instance.
-  virtual void AddKeySystemsInfoForUMA(
-      std::vector<KeySystemInfoForUMA>* key_systems_info_for_uma) = 0;
-
-  // Returns whether client key systems properties should be updated.
-  virtual bool IsKeySystemsUpdateNeeded() = 0;
-
   // Adds properties for supported key systems.
   virtual void AddSupportedKeySystems(
       std::vector<std::unique_ptr<KeySystemProperties>>*