Remove unused createContentDecryptionModule() code.

content/renderer/renderer_webkitplatformsupport_impl.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 "content/renderer/renderer_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/memory/shared_memory.h"
@@ skipping 781 matching lines @@
 bool RendererWebKitPlatformSupportImpl::loadAudioResource(
     blink::WebAudioBus* destination_bus, const char* audio_file_data,
     size_t data_size) {
   return DecodeAudioFileData(
       destination_bus, audio_file_data, data_size);
 }
 #endif  // defined(OS_ANDROID)
 
 //------------------------------------------------------------------------------
 
-blink::WebContentDecryptionModule*
-RendererWebKitPlatformSupportImpl::createContentDecryptionModule(
-    const blink::WebString& key_system) {
-  return WebContentDecryptionModuleImpl::Create(key_system);
-}
-
-//------------------------------------------------------------------------------
-
 blink::WebMIDIAccessor*
 RendererWebKitPlatformSupportImpl::createMIDIAccessor(
     blink::WebMIDIAccessorClient* client) {
   blink::WebMIDIAccessor* accessor =
       GetContentClient()->renderer()->OverrideCreateMIDIAccessor(client);
   if (accessor)
     return accessor;
 
   return new RendererWebMIDIAccessorImpl(client);
 }
@@ skipping 373 matching lines @@
     return;
   QuotaDispatcher::ThreadSpecificInstance(
       thread_safe_sender_.get(),
       quota_message_filter_.get())->QueryStorageUsageAndQuota(
           storage_partition,
           static_cast<quota::StorageType>(type),
           QuotaDispatcher::CreateWebStorageQuotaCallbacksWrapper(callbacks));
 }
 
 }  // namespace content