Add support for CDM_6.

Changes for CDM_6:
- ReleaseSession() becomes CloseSession()
- add RemoveSession()
- add GetUsableKeyIds()
- simulate UsableKeysChanged event for older CDMs

BUG=358271,351139
TEST=encrypted-media layout tests and browser_tests for encrypted media pass

Review URL: https://codereview.chromium.org/446693004

Cr-Commit-Position: refs/heads/master@{#288295}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288295 0039d316-1c4b-4281-b951-d872f2087c98

6 files changed, 375 insertions, 39 deletions

diff --git a/media/cdm/ppapi/cdm_adapter.cc b/media/cdm/ppapi/cdm_adapter.cc
index 14aa231..a54ab39 100644
--- a/media/cdm/ppapi/cdm_adapter.cc
+++ b/media/cdm/ppapi/cdm_adapter.cc
@@ -385,10 +385,28 @@ void CdmAdapter::UpdateSession(uint32_t promise_id,
 
 void CdmAdapter::ReleaseSession(uint32_t promise_id,
                                 const std::string& web_session_id) {
-  cdm_->ReleaseSession(
+  cdm_->CloseSession(
       promise_id, web_session_id.data(), web_session_id.length());
 }
 
+void CdmAdapter::RemoveSession(uint32_t promise_id,
+                               const std::string& web_session_id) {
+  if (!cdm_->RemoveSession(
+          promise_id, web_session_id.data(), web_session_id.length())) {
+    // CDM_4 and CDM_5 don't support this method, so reject the promise.
+    RejectPromise(promise_id, cdm::kNotSupportedError, 0, "Not implemented.");
+  }
+}
+
+void CdmAdapter::GetUsableKeyIds(uint32_t promise_id,
+                                 const std::string& web_session_id) {
+  if (!cdm_->GetUsableKeyIds(
+          promise_id, web_session_id.data(), web_session_id.length())) {
+    // CDM_4 and CDM_5 don't support this method, so reject the promise.
+    RejectPromise(promise_id, cdm::kNotSupportedError, 0, "Not implemented.");
+  }
+}
+
 // Note: In the following decryption/decoding related functions, errors are NOT
 // reported via KeyError, but are reported via corresponding PPB calls.
 
@@ -667,15 +685,25 @@ void CdmAdapter::OnSessionError(uint32_t session_id,
   }
 }
 
-// cdm::Host_5 methods
+// cdm::Host_5 and cdm::Host_6 methods
 
 cdm::Time CdmAdapter::GetCurrentTime() {
+  return GetCurrentWallTime();
+}
+
+cdm::Time CdmAdapter::GetCurrentWallTime() {
   return pp::Module::Get()->core()->GetTime();
 }
 
 void CdmAdapter::OnResolvePromise(uint32_t promise_id) {
   PostOnMain(callback_factory_.NewCallback(
       &CdmAdapter::SendPromiseResolvedInternal, promise_id));
+
+  // CDM_5 doesn't support OnSessionKeysChange(), so simulate one if requested.
+  // Passing "true" which may result in false positives for retrying.
+  std::string session_id;
+  if (cdm_->SessionUsableKeysEventNeeded(promise_id, &session_id))
+    OnSessionKeysChange(session_id.data(), session_id.length(), true);
 }
 
 void CdmAdapter::OnResolveNewSessionPromise(uint32_t promise_id,
@@ -685,6 +713,27 @@ void CdmAdapter::OnResolveNewSessionPromise(uint32_t promise_id,
       &CdmAdapter::SendPromiseResolvedWithSessionInternal,
       promise_id,
       std::string(web_session_id, web_session_id_length)));
+
+  // CDM_5 doesn't support OnSessionKeysChange(), so simulate one if requested.
+  // Passing "true" which may result in false positives for retrying.
+  std::string session_id;
+  if (cdm_->SessionUsableKeysEventNeeded(promise_id, &session_id))
+    OnSessionKeysChange(web_session_id, web_session_id_length, true);
+}
+
+void CdmAdapter::OnResolveKeyIdsPromise(uint32_t promise_id,
+                                        const cdm::BinaryData* usable_key_ids,
+                                        uint32_t usable_key_ids_length) {
+  std::vector<std::vector<uint8> > key_ids;
+  for (uint32_t i = 0; i < usable_key_ids_length; ++i) {
+    key_ids.push_back(
+        std::vector<uint8>(usable_key_ids[i].data,
+                           usable_key_ids[i].data + usable_key_ids[i].length));
+  }
+  PostOnMain(callback_factory_.NewCallback(
+      &CdmAdapter::SendPromiseResolvedWithUsableKeyIdsInternal,
+      promise_id,
+      key_ids));
 }
 
 void CdmAdapter::OnRejectPromise(uint32_t promise_id,
@@ -724,17 +773,26 @@ void CdmAdapter::OnSessionMessage(const char* web_session_id,
 void CdmAdapter::OnSessionKeysChange(const char* web_session_id,
                                      uint32_t web_session_id_length,
                                      bool has_additional_usable_key) {
-  // TODO(jrummell): Implement this event in subsequent CL
-  // (http://crbug.com/370251).
-  PP_NOTREACHED();
+  OnSessionUsableKeysChange(
+      web_session_id, web_session_id_length, has_additional_usable_key);
+}
+
+void CdmAdapter::OnSessionUsableKeysChange(const char* web_session_id,
+                                           uint32_t web_session_id_length,
+                                           bool has_additional_usable_key) {
+  PostOnMain(callback_factory_.NewCallback(
+      &CdmAdapter::SendSessionUsableKeysChangeInternal,
+      std::string(web_session_id, web_session_id_length),
+      has_additional_usable_key));
 }
 
 void CdmAdapter::OnExpirationChange(const char* web_session_id,
                                     uint32_t web_session_id_length,
                                     cdm::Time new_expiry_time) {
-  // TODO(jrummell): Implement this event in subsequent CL
-  // (http://crbug.com/370251).
-  PP_NOTREACHED();
+  PostOnMain(callback_factory_.NewCallback(
+      &CdmAdapter::SendExpirationChangeInternal,
+      std::string(web_session_id, web_session_id_length),
+      new_expiry_time));
 }
 
 void CdmAdapter::OnSessionReady(const char* web_session_id,
@@ -782,6 +840,15 @@ void CdmAdapter::SendPromiseResolvedWithSessionInternal(
                                                            web_session_id);
 }
 
+void CdmAdapter::SendPromiseResolvedWithUsableKeyIdsInternal(
+    int32_t result,
+    uint32_t promise_id,
+    std::vector<std::vector<uint8> > key_ids) {
+  PP_DCHECK(result == PP_OK);
+  // TODO(jrummell): Implement this event in subsequent CL.
+  // (http://crbug.com/358271).
+}
+
 void CdmAdapter::SendPromiseRejectedInternal(int32_t result,
                                              uint32_t promise_id,
                                              const SessionError& error) {
@@ -832,6 +899,23 @@ void CdmAdapter::SendSessionErrorInternal(int32_t result,
       error.error_description);
 }
 
+void CdmAdapter::SendSessionUsableKeysChangeInternal(
+    int32_t result,
+    const std::string& web_session_id,
+    bool has_additional_usable_key) {
+  PP_DCHECK(result == PP_OK);
+  // TODO(jrummell): Implement this event in subsequent CL.
+  // (http://crbug.com/358271).
+}
+
+void CdmAdapter::SendExpirationChangeInternal(int32_t result,
+                                              const std::string& web_session_id,
+                                              cdm::Time new_expiry_time) {
+  PP_DCHECK(result == PP_OK);
+  // TODO(jrummell): Implement this event in subsequent CL.
+  // (http://crbug.com/358271).
+}
+
 void CdmAdapter::DeliverBlock(int32_t result,
                               const cdm::Status& status,
                               const LinkedDecryptedBlock& decrypted_block,
@@ -1214,7 +1298,7 @@ void* GetCdmHost(int host_interface_version, void* user_data) {
     return NULL;
 
   COMPILE_ASSERT(
-      cdm::ContentDecryptionModule::Host::kVersion == cdm::Host_5::kVersion,
+      cdm::ContentDecryptionModule::Host::kVersion == cdm::Host_6::kVersion,
       update_code_below);
 
   // Ensure IsSupportedCdmHostVersion matches implementation of this function.
@@ -1224,10 +1308,11 @@ void* GetCdmHost(int host_interface_version, void* user_data) {
 
   PP_DCHECK(
       // Future version is not supported.
-      !IsSupportedCdmHostVersion(cdm::Host_5::kVersion + 1) &&
+      !IsSupportedCdmHostVersion(cdm::Host_6::kVersion + 1) &&
       // Current version is supported.
-      IsSupportedCdmHostVersion(cdm::Host_5::kVersion) &&
+      IsSupportedCdmHostVersion(cdm::Host_6::kVersion) &&
       // Include all previous supported versions (if any) here.
+      IsSupportedCdmHostVersion(cdm::Host_5::kVersion) &&
       IsSupportedCdmHostVersion(cdm::Host_4::kVersion) &&
       // One older than the oldest supported version is not supported.
       !IsSupportedCdmHostVersion(cdm::Host_4::kVersion - 1));
@@ -1240,6 +1325,8 @@ void* GetCdmHost(int host_interface_version, void* user_data) {
       return static_cast<cdm::Host_4*>(cdm_adapter);
     case cdm::Host_5::kVersion:
       return static_cast<cdm::Host_5*>(cdm_adapter);
+    case cdm::Host_6::kVersion:
+      return static_cast<cdm::Host_6*>(cdm_adapter);
     default:
       PP_NOTREACHED();
       return NULL;
diff --git a/media/cdm/ppapi/cdm_adapter.h b/media/cdm/ppapi/cdm_adapter.h
index 0189c1f..07b5ad1 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;
@@ -86,7 +93,7 @@ class CdmAdapter : public pp::Instance,
       pp::Buffer_Dev encrypted_buffer,
       const PP_EncryptedBlockInfo& encrypted_block_info) OVERRIDE;
 
-  // cdm::Host_4 and cdm::Host_5 implementation.
+  // cdm::Host_4, cdm::Host_5 and cdm::Host_6 implementation.
   virtual cdm::Buffer* Allocate(uint32_t capacity) OVERRIDE;
   virtual void SetTimer(int64_t delay_ms, void* context) 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,
diff --git a/media/cdm/ppapi/cdm_wrapper.h b/media/cdm/ppapi/cdm_wrapper.h
index 665b6b6..b27be42 100644
--- a/media/cdm/ppapi/cdm_wrapper.h
+++ b/media/cdm/ppapi/cdm_wrapper.h
@@ -56,9 +56,15 @@ class CdmWrapper {
                              uint32_t web_session_id_size,
                              const uint8_t* response,
                              uint32_t response_size) = 0;
-  virtual void ReleaseSession(uint32_t promise_id,
-                              const char* web_session_id,
-                              uint32_t web_session_id_size) = 0;
+  virtual void CloseSession(uint32_t promise_id,
+                            const char* web_session_id,
+                            uint32_t web_session_id_size) = 0;
+  virtual bool RemoveSession(uint32_t promise_id,
+                             const char* web_session_id,
+                             uint32_t web_session_id_size) = 0;
+  virtual bool GetUsableKeyIds(uint32_t promise_id,
+                               const char* web_session_id,
+                               uint32_t web_session_id_size) = 0;
   virtual void TimerExpired(void* context) = 0;
   virtual cdm::Status Decrypt(const cdm::InputBuffer& encrypted_buffer,
                               cdm::DecryptedBlock* decrypted_buffer) = 0;
@@ -95,6 +101,32 @@ class CdmWrapper {
   virtual std::string LookupWebSessionId(uint32_t session_id) = 0;
   virtual void DropWebSessionId(std::string web_session_id) = 0;
 
+  // Helper functions for the cdm::Host_4 and cdm::Host_5 methods.
+  // CDMs using cdm::Host_6 will call OnSessionUsableKeys() as necessary when
+  // resolving LoadSession() and UpdateSession(). This needs to be simulated
+  // for the older CDMs. These must not be called for cdm::Host_6 and later.
+  // TODO(jrummell): Remove these once Host_4 and Host_5 interfaces are removed.
+
+  // Query whether a SessionUsableKeys event is necessary for the specified
+  // |promise_id|. Returns true if needed and |web_session_id| is updated,
+  // otherwise returns false.
+  virtual bool SessionUsableKeysEventNeeded(uint32_t promise_id,
+                                            std::string* web_session_id) = 0;
+
+  // Used to indicate that a SessionUsableKeys event is required for the
+  // specified |promise_id| and associated |web_session_id|.
+  virtual void SetSessionUsableKeysEventNeeded(
+      uint32_t promise_id,
+      const char* web_session_id,
+      uint32_t web_session_id_size) = 0;
+
+  // cdm::Host_6 introduces InputBuffer_2 (aka InputBuffer). cdm::Host_4 and
+  // cdm::Host_5 methods still use InputBuffer_1, so this helper function
+  // converts InputBuffer_2 to InputBuffer_1.
+  // TODO(jrummell): Remove these once Host_4 and Host_5 interfaces are removed.
+  virtual void ConvertInputBuffer(const cdm::InputBuffer& v2,
+                                  cdm::InputBuffer_1* v1) = 0;
+
  protected:
   CdmWrapper() {}
 
@@ -158,10 +190,24 @@ class CdmWrapperImpl : public CdmWrapper {
                         response_size);
   }
 
-  virtual void ReleaseSession(uint32_t promise_id,
-                              const char* web_session_id,
-                              uint32_t web_session_id_size) OVERRIDE {
-    cdm_->ReleaseSession(promise_id, web_session_id, web_session_id_size);
+  virtual bool GetUsableKeyIds(uint32_t promise_id,
+                               const char* web_session_id,
+                               uint32_t web_session_id_size) OVERRIDE {
+    cdm_->GetUsableKeyIds(promise_id, web_session_id, web_session_id_size);
+    return true;
+  }
+
+  virtual void CloseSession(uint32_t promise_id,
+                            const char* web_session_id,
+                            uint32_t web_session_id_size) OVERRIDE {
+    cdm_->CloseSession(promise_id, web_session_id, web_session_id_size);
+  }
+
+  virtual bool RemoveSession(uint32_t promise_id,
+                             const char* web_session_id,
+                             uint32_t web_session_id_size) OVERRIDE {
+    cdm_->RemoveSession(promise_id, web_session_id, web_session_id_size);
+    return true;
   }
 
   virtual void TimerExpired(void* context) OVERRIDE {
@@ -261,6 +307,38 @@ class CdmWrapperImpl : public CdmWrapper {
     web_session_to_session_id_map_.erase(web_session_id);
   }
 
+  virtual bool SessionUsableKeysEventNeeded(uint32_t promise_id,
+                                            std::string* web_session_id) {
+    std::map<uint32_t, std::string>::iterator it =
+        promises_needing_usable_keys_event_.find(promise_id);
+    if (it == promises_needing_usable_keys_event_.end())
+      return false;
+    web_session_id->swap(it->second);
+    promises_needing_usable_keys_event_.erase(it);
+    return true;
+  }
+
+  virtual void SetSessionUsableKeysEventNeeded(uint32_t promise_id,
+                                               const char* web_session_id,
+                                               uint32_t web_session_id_size) {
+    promises_needing_usable_keys_event_.insert(std::make_pair(
+        promise_id, std::string(web_session_id, web_session_id_size)));
+  }
+
+  virtual void ConvertInputBuffer(const cdm::InputBuffer& v2,
+                                  cdm::InputBuffer_1* v1) {
+    v1->data = v2.data;
+    v1->data_size = v2.data_size;
+    v1->data_offset = 0;
+    v1->key_id = v2.key_id;
+    v1->key_id_size = v2.key_id_size;
+    v1->iv = v2.iv;
+    v1->iv_size = v2.iv_size;
+    v1->subsamples = v2.subsamples;
+    v1->num_subsamples = v2.num_subsamples;
+    v1->timestamp = v2.timestamp;
+  }
+
  private:
   CdmWrapperImpl(CdmInterface* cdm) : cdm_(cdm), next_session_id_(100) {
     PP_DCHECK(cdm_);
@@ -272,6 +350,8 @@ class CdmWrapperImpl : public CdmWrapper {
   uint32_t next_session_id_;
   std::map<std::string, uint32_t> web_session_to_session_id_map_;
 
+  std::map<uint32_t, std::string> promises_needing_usable_keys_event_;
+
   DISALLOW_COPY_AND_ASSIGN(CdmWrapperImpl);
 };
 
@@ -308,6 +388,10 @@ void CdmWrapperImpl<cdm::ContentDecryptionModule_4>::LoadSession(
     uint32_t web_session_id_size) {
   uint32_t session_id = CreateSessionId();
   RegisterPromise(session_id, promise_id);
+  // As CDM_4 doesn't support OnSessionUsableKeysChange(), make sure to generate
+  // one when the promise is resolved. This may be overly aggressive.
+  SetSessionUsableKeysEventNeeded(
+      promise_id, web_session_id, web_session_id_size);
   cdm_->LoadSession(session_id, web_session_id, web_session_id_size);
 }
 
@@ -321,11 +405,15 @@ void CdmWrapperImpl<cdm::ContentDecryptionModule_4>::UpdateSession(
   std::string web_session_str(web_session_id, web_session_id_size);
   uint32_t session_id = LookupSessionId(web_session_str);
   RegisterPromise(session_id, promise_id);
+  // As CDM_4 doesn't support OnSessionUsableKeysChange(), make sure to generate
+  // one when the promise is resolved. This may be overly aggressive.
+  SetSessionUsableKeysEventNeeded(
+      promise_id, web_session_id, web_session_id_size);
   cdm_->UpdateSession(session_id, response, response_size);
 }
 
 template <>
-void CdmWrapperImpl<cdm::ContentDecryptionModule_4>::ReleaseSession(
+void CdmWrapperImpl<cdm::ContentDecryptionModule_4>::CloseSession(
     uint32_t promise_id,
     const char* web_session_id,
     uint32_t web_session_id_size) {
@@ -335,12 +423,140 @@ void CdmWrapperImpl<cdm::ContentDecryptionModule_4>::ReleaseSession(
   cdm_->ReleaseSession(session_id);
 }
 
+template <>
+bool CdmWrapperImpl<cdm::ContentDecryptionModule_4>::RemoveSession(
+    uint32_t promise_id,
+    const char* web_session_id,
+    uint32_t web_session_id_size) {
+  return false;
+}
+
+template <>
+bool CdmWrapperImpl<cdm::ContentDecryptionModule_4>::GetUsableKeyIds(
+    uint32_t promise_id,
+    const char* web_session_id,
+    uint32_t web_session_id_size) {
+  return false;
+}
+
+template <>
+cdm::Status CdmWrapperImpl<cdm::ContentDecryptionModule_4>::Decrypt(
+    const cdm::InputBuffer& encrypted_buffer,
+    cdm::DecryptedBlock* decrypted_buffer) {
+  cdm::InputBuffer_1 buffer;
+  ConvertInputBuffer(encrypted_buffer, &buffer);
+  return cdm_->Decrypt(buffer, decrypted_buffer);
+}
+
+template <>
+cdm::Status
+CdmWrapperImpl<cdm::ContentDecryptionModule_4>::DecryptAndDecodeFrame(
+    const cdm::InputBuffer& encrypted_buffer,
+    cdm::VideoFrame* video_frame) {
+  cdm::InputBuffer_1 buffer;
+  ConvertInputBuffer(encrypted_buffer, &buffer);
+  return cdm_->DecryptAndDecodeFrame(buffer, video_frame);
+}
+
+template <>
+cdm::Status
+CdmWrapperImpl<cdm::ContentDecryptionModule_4>::DecryptAndDecodeSamples(
+    const cdm::InputBuffer& encrypted_buffer,
+    cdm::AudioFrames* audio_frames) {
+  cdm::InputBuffer_1 buffer;
+  ConvertInputBuffer(encrypted_buffer, &buffer);
+  return cdm_->DecryptAndDecodeSamples(buffer, audio_frames);
+}
+
+// Overrides for the cdm::Host_5 methods.
+// TODO(jrummell): Remove these once Host_5 interface is removed.
+
+template <>
+void CdmWrapperImpl<cdm::ContentDecryptionModule_5>::LoadSession(
+    uint32_t promise_id,
+    const char* web_session_id,
+    uint32_t web_session_id_size) {
+  // As CDM_5 doesn't support OnSessionUsableKeysChange(), make sure to generate
+  // one when the promise is resolved. This may be overly aggressive.
+  SetSessionUsableKeysEventNeeded(
+      promise_id, web_session_id, web_session_id_size);
+  cdm_->LoadSession(promise_id, web_session_id, web_session_id_size);
+}
+
+template <>
+void CdmWrapperImpl<cdm::ContentDecryptionModule_5>::UpdateSession(
+    uint32_t promise_id,
+    const char* web_session_id,
+    uint32_t web_session_id_size,
+    const uint8_t* response,
+    uint32_t response_size) {
+  // As CDM_5 doesn't support OnSessionUsableKeysChange(), make sure to generate
+  // one when the promise is resolved. This may be overly aggressive.
+  SetSessionUsableKeysEventNeeded(
+      promise_id, web_session_id, web_session_id_size);
+  cdm_->UpdateSession(
+      promise_id, web_session_id, web_session_id_size, response, response_size);
+}
+
+template <>
+void CdmWrapperImpl<cdm::ContentDecryptionModule_5>::CloseSession(
+    uint32_t promise_id,
+    const char* web_session_id,
+    uint32_t web_session_id_size) {
+  cdm_->ReleaseSession(promise_id, web_session_id, web_session_id_size);
+}
+
+template <>
+bool CdmWrapperImpl<cdm::ContentDecryptionModule_5>::RemoveSession(
+    uint32_t promise_id,
+    const char* web_session_id,
+    uint32_t web_session_id_size) {
+  return false;
+}
+
+template <>
+bool CdmWrapperImpl<cdm::ContentDecryptionModule_5>::GetUsableKeyIds(
+    uint32_t promise_id,
+    const char* web_session_id,
+    uint32_t web_session_id_size) {
+  return false;
+}
+
+template <>
+cdm::Status CdmWrapperImpl<cdm::ContentDecryptionModule_5>::Decrypt(
+    const cdm::InputBuffer& encrypted_buffer,
+    cdm::DecryptedBlock* decrypted_buffer) {
+  cdm::InputBuffer_1 buffer;
+  ConvertInputBuffer(encrypted_buffer, &buffer);
+  return cdm_->Decrypt(buffer, decrypted_buffer);
+}
+
+template <>
+cdm::Status
+CdmWrapperImpl<cdm::ContentDecryptionModule_5>::DecryptAndDecodeFrame(
+    const cdm::InputBuffer& encrypted_buffer,
+    cdm::VideoFrame* video_frame) {
+  cdm::InputBuffer_1 buffer;
+  ConvertInputBuffer(encrypted_buffer, &buffer);
+  return cdm_->DecryptAndDecodeFrame(buffer, video_frame);
+}
+
+template <>
+cdm::Status
+CdmWrapperImpl<cdm::ContentDecryptionModule_5>::DecryptAndDecodeSamples(
+    const cdm::InputBuffer& encrypted_buffer,
+    cdm::AudioFrames* audio_frames) {
+  cdm::InputBuffer_1 buffer;
+  ConvertInputBuffer(encrypted_buffer, &buffer);
+  return cdm_->DecryptAndDecodeSamples(buffer, audio_frames);
+}
+
 CdmWrapper* CdmWrapper::Create(const char* key_system,
                                uint32_t key_system_size,
                                GetCdmHostFunc get_cdm_host_func,
                                void* user_data) {
   COMPILE_ASSERT(cdm::ContentDecryptionModule::kVersion ==
-                     cdm::ContentDecryptionModule_5::kVersion,
+                     cdm::ContentDecryptionModule_6::kVersion,
                  update_code_below);
 
   // Ensure IsSupportedCdmInterfaceVersion() matches this implementation.
@@ -365,6 +581,11 @@ CdmWrapper* CdmWrapper::Create(const char* key_system,
 
   // If |cdm_wrapper| is NULL, try to create the CDM using older supported
   // versions of the CDM interface.
+  cdm_wrapper = CdmWrapperImpl<cdm::ContentDecryptionModule_5>::Create(
+      key_system, key_system_size, get_cdm_host_func, user_data);
+  if (cdm_wrapper)
+    return cdm_wrapper;
+
   cdm_wrapper = CdmWrapperImpl<cdm::ContentDecryptionModule_4>::Create(
       key_system, key_system_size, get_cdm_host_func, user_data);
   return cdm_wrapper;
@@ -375,7 +596,7 @@ CdmWrapper* CdmWrapper::Create(const char* key_system,
 // does not have.
 // Also update supported_cdm_versions.h.
 COMPILE_ASSERT(cdm::ContentDecryptionModule::kVersion ==
-                   cdm::ContentDecryptionModule_5::kVersion,
+                   cdm::ContentDecryptionModule_6::kVersion,
                ensure_cdm_wrapper_templates_have_old_version_support);
 
 }  // namespace media
diff --git a/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc b/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
index 6f0809f..a643920 100644
--- a/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
+++ b/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
@@ -95,7 +95,7 @@ const char kFileIOTestResultHeader[] = "FILEIOTESTRESULT";
 // Copies |input_buffer| into a media::DecoderBuffer. If the |input_buffer| is
 // empty, an empty (end-of-stream) media::DecoderBuffer is returned.
 static scoped_refptr<media::DecoderBuffer> CopyDecoderBufferFrom(
-    const cdm::InputBuffer& input_buffer) {
+    const cdm::InputBuffer_1& input_buffer) {
   if (!input_buffer.data) {
     DCHECK(!input_buffer.data_size);
     return media::DecoderBuffer::CreateEOSBuffer();
@@ -381,9 +381,8 @@ static void CopyDecryptResults(
   *buffer_copy = buffer;
 }
 
-cdm::Status ClearKeyCdm::Decrypt(
-    const cdm::InputBuffer& encrypted_buffer,
-    cdm::DecryptedBlock* decrypted_block) {
+cdm::Status ClearKeyCdm::Decrypt(const cdm::InputBuffer_1& encrypted_buffer,
+                                 cdm::DecryptedBlock* decrypted_block) {
   DVLOG(1) << "Decrypt()";
   DCHECK(encrypted_buffer.data);
 
@@ -488,7 +487,7 @@ void ClearKeyCdm::DeinitializeDecoder(cdm::StreamType decoder_type) {
 }
 
 cdm::Status ClearKeyCdm::DecryptAndDecodeFrame(
-    const cdm::InputBuffer& encrypted_buffer,
+    const cdm::InputBuffer_1& encrypted_buffer,
     cdm::VideoFrame* decoded_frame) {
   DVLOG(1) << "DecryptAndDecodeFrame()";
   TRACE_EVENT0("media", "ClearKeyCdm::DecryptAndDecodeFrame");
@@ -512,7 +511,7 @@ cdm::Status ClearKeyCdm::DecryptAndDecodeFrame(
 }
 
 cdm::Status ClearKeyCdm::DecryptAndDecodeSamples(
-    const cdm::InputBuffer& encrypted_buffer,
+    const cdm::InputBuffer_1& encrypted_buffer,
     cdm::AudioFrames* audio_frames) {
   DVLOG(1) << "DecryptAndDecodeSamples()";
 
@@ -570,7 +569,7 @@ void ClearKeyCdm::ScheduleNextHeartBeat() {
 }
 
 cdm::Status ClearKeyCdm::DecryptToMediaDecoderBuffer(
-    const cdm::InputBuffer& encrypted_buffer,
+    const cdm::InputBuffer_1& encrypted_buffer,
     scoped_refptr<media::DecoderBuffer>* decrypted_buffer) {
   DCHECK(decrypted_buffer);
   scoped_refptr<media::DecoderBuffer> buffer =
diff --git a/media/cdm/ppapi/external_clear_key/clear_key_cdm.h b/media/cdm/ppapi/external_clear_key/clear_key_cdm.h
index 5903642..0288998 100644
--- a/media/cdm/ppapi/external_clear_key/clear_key_cdm.h
+++ b/media/cdm/ppapi/external_clear_key/clear_key_cdm.h
@@ -57,7 +57,7 @@ class ClearKeyCdm : public ClearKeyCdmInterface {
       const uint8_t* server_certificate_data,
       uint32_t server_certificate_data_size) OVERRIDE;
   virtual void TimerExpired(void* context) OVERRIDE;
-  virtual cdm::Status Decrypt(const cdm::InputBuffer& encrypted_buffer,
+  virtual cdm::Status Decrypt(const cdm::InputBuffer_1& encrypted_buffer,
                               cdm::DecryptedBlock* decrypted_block) OVERRIDE;
   virtual cdm::Status InitializeAudioDecoder(
       const cdm::AudioDecoderConfig& audio_decoder_config) OVERRIDE;
@@ -66,10 +66,10 @@ class ClearKeyCdm : public ClearKeyCdmInterface {
   virtual void DeinitializeDecoder(cdm::StreamType decoder_type) OVERRIDE;
   virtual void ResetDecoder(cdm::StreamType decoder_type) OVERRIDE;
   virtual cdm::Status DecryptAndDecodeFrame(
-      const cdm::InputBuffer& encrypted_buffer,
+      const cdm::InputBuffer_1& encrypted_buffer,
       cdm::VideoFrame* video_frame) OVERRIDE;
   virtual cdm::Status DecryptAndDecodeSamples(
-      const cdm::InputBuffer& encrypted_buffer,
+      const cdm::InputBuffer_1& encrypted_buffer,
       cdm::AudioFrames* audio_frames) OVERRIDE;
   virtual void Destroy() OVERRIDE;
   virtual void OnPlatformChallengeResponse(
@@ -111,7 +111,7 @@ class ClearKeyCdm : public ClearKeyCdmInterface {
   // Returns cdm::kDecryptError if any decryption error occurred. In this case
   // |decrypted_buffer| should be ignored by the caller.
   cdm::Status DecryptToMediaDecoderBuffer(
-      const cdm::InputBuffer& encrypted_buffer,
+      const cdm::InputBuffer_1& encrypted_buffer,
       scoped_refptr<DecoderBuffer>* decrypted_buffer);
 
 #if defined(CLEAR_KEY_CDM_USE_FAKE_AUDIO_DECODER)
diff --git a/media/cdm/ppapi/supported_cdm_versions.h b/media/cdm/ppapi/supported_cdm_versions.h
index 8de7a8c..fc05345 100644
--- a/media/cdm/ppapi/supported_cdm_versions.h
+++ b/media/cdm/ppapi/supported_cdm_versions.h
@@ -21,10 +21,11 @@ bool IsSupportedCdmModuleVersion(int version) {
 
 bool IsSupportedCdmInterfaceVersion(int version) {
   COMPILE_ASSERT(cdm::ContentDecryptionModule::kVersion ==
-                     cdm::ContentDecryptionModule_5::kVersion,
+                     cdm::ContentDecryptionModule_6::kVersion,
                  update_code_below);
   switch(version) {
     // Supported versions in decreasing order.
+    case cdm::ContentDecryptionModule_6::kVersion:
     case cdm::ContentDecryptionModule_5::kVersion:
     case cdm::ContentDecryptionModule_4::kVersion:
       return true;
@@ -35,10 +36,11 @@ bool IsSupportedCdmInterfaceVersion(int version) {
 
 bool IsSupportedCdmHostVersion(int version) {
   COMPILE_ASSERT(cdm::ContentDecryptionModule::Host::kVersion ==
-                     cdm::ContentDecryptionModule_5::Host::kVersion,
+                     cdm::ContentDecryptionModule_6::Host::kVersion,
                  update_code_below);
   switch(version) {
     // Supported versions in decreasing order.
+    case cdm::Host_6::kVersion:
     case cdm::Host_5::kVersion:
     case cdm::Host_4::kVersion:
       return true;