Allow a null initData for external CDMs.

webkit/media/crypto/ppapi/cdm_wrapper.cc

 // Copyright (c) 2012 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.
 
 #include <cstring>
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 642 matching lines @@
   PP_DCHECK(cdm_);  // GenerateKeyRequest() should have succeeded.
   if (!cdm_) {
     SendUnknownKeyError(key_system_, session_id);
     return;
   }
 
   const uint8_t* key_ptr = static_cast<const uint8_t*>(key.Map());
   int key_size = key.ByteLength();
   const uint8_t* init_data_ptr = static_cast<const uint8_t*>(init_data.Map());
   int init_data_size = init_data.ByteLength();
+  PP_DCHECK(!init_data_ptr == !init_data_size);
 
-  if (!key_ptr || key_size <= 0 || !init_data_ptr || init_data_size <= 0) {
+  if (!key_ptr || key_size <= 0) {
     SendUnknownKeyError(key_system_, session_id);
     return;
   }
 
   cdm::Status status = cdm_->AddKey(session_id.data(), session_id.size(),
                                     key_ptr, key_size,
                                     init_data_ptr, init_data_size);
   PP_DCHECK(status == cdm::kSuccess || status == cdm::kSessionError);
   if (status != cdm::kSuccess) {
     SendUnknownKeyError(key_system_, session_id);
@@ skipping 462 matching lines @@
 }  // namespace webkit_media
 
 namespace pp {
 
 // Factory function for your specialization of the Module object.
 Module* CreateModule() {
   return new webkit_media::CdmWrapperModule();
 }
 
 }  // namespace pp