Removed unused NeedKey callback from Decryptors.

webkit/plugins/ppapi/content_decryptor_delegate.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 "webkit/plugins/ppapi/content_decryptor_delegate.h"
 
 #include "base/callback_helpers.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "media/base/audio_decoder_config.h"
@@ skipping 276 matching lines @@
 
 void ContentDecryptorDelegate::Initialize(const std::string& key_system) {
   // TODO(ddorwin): Add an Initialize method to PPP_ContentDecryptor_Private.
   DCHECK(!key_system.empty());
   key_system_ = key_system;
 }
 
 void ContentDecryptorDelegate::SetKeyEventCallbacks(
     const media::KeyAddedCB& key_added_cb,
     const media::KeyErrorCB& key_error_cb,
-    const media::KeyMessageCB& key_message_cb,
-    const media::NeedKeyCB& need_key_cb) {
+    const media::KeyMessageCB& key_message_cb) {
   key_added_cb_ = key_added_cb;
   key_error_cb_ = key_error_cb;
   key_message_cb_ = key_message_cb;
-  need_key_cb_ = need_key_cb;
 }
 
 bool ContentDecryptorDelegate::GenerateKeyRequest(const std::string& type,
                                                   const uint8* init_data,
                                                   int init_data_length) {
   PP_Var init_data_array =
       PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferPPVar(
           init_data_length, init_data);
 
   plugin_decryption_interface_->GenerateKeyRequest(
@@ skipping 705 matching lines @@
 
   if (free_buffers_.empty())
     return;
 
   tracking_info->buffer_id = free_buffers_.front();
   free_buffers_.pop();
 }
 
 }  // namespace ppapi
 }  // namespace webkit