Rename EME WD call parameters

content/renderer/media/webcontentdecryptionmodulesession_impl.h

Index: content/renderer/media/webcontentdecryptionmodulesession_impl.h
diff --git a/content/renderer/media/webcontentdecryptionmodulesession_impl.h b/content/renderer/media/webcontentdecryptionmodulesession_impl.h
index 68527d00cd91a0a5b5f4451ff29003b5f484eec9..6ff091c876ad7e00c2c0c52a0131cbd0189b4efb 100644
--- a/content/renderer/media/webcontentdecryptionmodulesession_impl.h
+++ b/content/renderer/media/webcontentdecryptionmodulesession_impl.h
@@ -23,9 +23,10 @@ namespace content {
 class WebContentDecryptionModuleSessionImpl
     : public blink::WebContentDecryptionModuleSession {
  public:
-  typedef base::Callback<void(uint32 reference_id)> SessionClosedCB;
+  typedef base::Callback<void(uint32 session_id)> SessionClosedCB;
 
   WebContentDecryptionModuleSessionImpl(
+      uint32 session_id,
       media::MediaKeys* media_keys,
       Client* client,
       const SessionClosedCB& session_closed_cb);
@@ -39,12 +40,8 @@ class WebContentDecryptionModuleSessionImpl
   virtual void update(const uint8* response, size_t response_length) OVERRIDE;
   virtual void close() OVERRIDE;
 
-  const std::string& session_id() const { return session_id_; }
-
-  uint32 reference_id() const { return reference_id_; }
-
   // Callbacks.
-  void OnSessionCreated(const std::string& session_id);
+  void OnSessionCreated(const std::string& web_session_id);
   void OnSessionMessage(const std::vector<uint8>& message,
                         const std::string& destination_url);
   void OnSessionReady();
@@ -58,16 +55,13 @@ class WebContentDecryptionModuleSessionImpl
 
   SessionClosedCB session_closed_cb_;
 
-  // Session ID is the user visible ID for this session generated by the CDM.
+  // Web session ID is the app visible ID for this session generated by the CDM.
   // This value is not set until the CDM calls OnSessionCreated().
-  std::string session_id_;
+  blink::WebString web_session_id_;
 
-  // Reference ID is used to uniquely track this object so that CDM callbacks
+  // Session ID is used to uniquely track this object so that CDM callbacks
   // can get routed to the correct object.
-  const uint32 reference_id_;
-
-  // Reference ID should be unique per renderer process for debugging purposes.
-  static uint32 next_reference_id_;
+  const uint32 session_id_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentDecryptionModuleSessionImpl);
 };