Add support for CDM_6.

media/cdm/ppapi/cdm_adapter.h

Index: media/cdm/ppapi/cdm_adapter.h
diff --git a/media/cdm/ppapi/cdm_adapter.h b/media/cdm/ppapi/cdm_adapter.h
index 0189c1fc353cdecf02014ceb9e09a864c88dc0f3..c18847a3d3c3852cea1c40d64916295d8770b1e9 100644
--- a/media/cdm/ppapi/cdm_adapter.h
+++ b/media/cdm/ppapi/cdm_adapter.h
@@ -43,7 +43,8 @@ void* GetCdmHost(int host_interface_version, void* user_data);
 class CdmAdapter : public pp::Instance,
                    public pp::ContentDecryptor_Private,
                    public cdm::Host_4,
-                   public cdm::Host_5 {
+                   public cdm::Host_5,
+                   public cdm::Host_6 {
  public:
   CdmAdapter(PP_Instance instance, pp::Module* module);
   virtual ~CdmAdapter();
@@ -66,8 +67,14 @@ class CdmAdapter : public pp::Instance,
   virtual void UpdateSession(uint32_t promise_id,
                              const std::string& web_session_id,
                              pp::VarArrayBuffer response) OVERRIDE;
+  // TODO(jrummell): Rename to CloseSession().
   virtual void ReleaseSession(uint32_t promise_id,
                               const std::string& web_session_id) OVERRIDE;
+  // TODO(jrummell): Pass these 2 functions through Pepper and add OVERRIDE.
+  virtual void RemoveSession(uint32_t promise_id,
+                             const std::string& web_session_id);
+  virtual void GetUsableKeyIds(uint32_t promise_id,
+                               const std::string& web_session_id);
   virtual void Decrypt(
       pp::Buffer_Dev encrypted_buffer,
       const PP_EncryptedBlockInfo& encrypted_block_info) OVERRIDE;
@@ -126,10 +133,10 @@ class CdmAdapter : public pp::Instance,
                                 uint32_t destination_url_length) OVERRIDE;
   virtual void OnSessionKeysChange(const char* web_session_id,
                                    uint32_t web_session_id_length,
-                                   bool has_additional_usable_key);
+                                   bool has_additional_usable_key) OVERRIDE;
   virtual void OnExpirationChange(const char* web_session_id,
                                   uint32_t web_session_id_length,
-                                  cdm::Time new_expiry_time);
+                                  cdm::Time new_expiry_time) OVERRIDE;
   virtual void OnSessionReady(const char* web_session_id,
                               uint32_t web_session_id_length) OVERRIDE;
   virtual void OnSessionClosed(const char* web_session_id,
@@ -141,7 +148,17 @@ class CdmAdapter : public pp::Instance,
                               const char* error_message,
                               uint32_t error_message_length) OVERRIDE;
 
-  // cdm::Host_4 and cdm::Host_5 implementation.
+  // cdm::Host_6 implementation.
+  virtual cdm::Time GetCurrentWallTime() OVERRIDE;
+  virtual void OnResolveKeyIdsPromise(uint32_t promise_id,
+                                      const cdm::BinaryData* usable_key_ids,
+                                      uint32_t usable_key_ids_length) OVERRIDE;
+  virtual void OnSessionUsableKeysChange(
+      const char* web_session_id,
+      uint32_t web_session_id_length,
+      bool has_additional_usable_key) OVERRIDE;
+
+  // cdm::Host_4, cdm::Host_5 and cdm::Host_6 implementation.
   virtual void SendPlatformChallenge(const char* service_id,
                                      uint32_t service_id_length,
                                      const char* challenge,
@@ -186,6 +203,10 @@ class CdmAdapter : public pp::Instance,
       int32_t result,
       uint32_t promise_id,
       const std::string& web_session_id);
+  void SendPromiseResolvedWithUsableKeyIdsInternal(
+      int32_t result,
+      uint32_t promise_id,
+      std::vector<std::vector<uint8> > key_ids);
   void SendPromiseRejectedInternal(int32_t result,
                                    uint32_t promise_id,
                                    const SessionError& error);
@@ -200,6 +221,12 @@ class CdmAdapter : public pp::Instance,
   void SendSessionErrorInternal(int32_t result,
                                 const std::string& web_session_id,
                                 const SessionError& error);
+  void SendSessionUsableKeysChangeInternal(int32_t result,
+                                           const std::string& web_session_id,
+                                           bool has_additional_usable_key);
+  void SendExpirationChangeInternal(int32_t result,
+                                    const std::string& web_session_id,
+                                    cdm::Time new_expiry_time);
   void RejectPromise(uint32_t promise_id,
                      cdm::Error error,
                      uint32_t system_code,