Relocate last remnants of webkit/renderer/media code.

media/cdm/ppapi/linked_ptr.h

 // Copyright 2013 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.
 //
 // This is a copy of base/linked_ptr.h with CHECKS/DCHECKS replaced with
 // PP_DCHECKs.
 //
 // A "smart" pointer type with reference tracking.  Every pointer to a
 // particular object is kept on a circular linked list.  When the last pointer
 // to an object is destroyed or reassigned, the object is deleted.
@@ skipping 19 matching lines @@
 //
 // Thread Safety:
 //   A linked_ptr is NOT thread safe. Copying a linked_ptr object is
 //   effectively a read-write operation.
 //
 // Alternative: to linked_ptr is shared_ptr, which
 //  - is also two pointers in size (8 bytes for 32 bit addresses)
 //  - is thread safe for copying and deletion
 //  - supports weak_ptrs
 
-#ifndef WEBKIT_RENDERER_MEDIA_CRYPTO_PPAPI_LINKED_PTR_H_
-#define WEBKIT_RENDERER_MEDIA_CRYPTO_PPAPI_LINKED_PTR_H_
+#ifndef MEDIA_CDM_PPAPI_LINKED_PTR_H_
+#define MEDIA_CDM_PPAPI_LINKED_PTR_H_
 
 #include "ppapi/cpp/logging.h"
 
 // This is used internally by all instances of linked_ptr<>.  It needs to be
 // a non-template class because different types of linked_ptr<> can refer to
 // the same object (linked_ptr<Superclass>(obj) vs linked_ptr<Subclass>(obj)).
 // So, it needs to be possible for different types of linked_ptr to participate
 // in the same circular linked list, so we need a single class type here.
 //
 // DO NOT USE THIS CLASS DIRECTLY YOURSELF.  Use linked_ptr<T>.
@@ skipping 123 matching lines @@
 }
 
 // A function to convert T* into linked_ptr<T>
 // Doing e.g. make_linked_ptr(new FooBarBaz<type>(arg)) is a shorter notation
 // for linked_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg))
 template <typename T>
 linked_ptr<T> make_linked_ptr(T* ptr) {
   return linked_ptr<T>(ptr);
 }
 
-#endif  // WEBKIT_RENDERER_MEDIA_CRYPTO_PPAPI_LINKED_PTR_H_
+#endif  // MEDIA_CDM_PPAPI_LINKED_PTR_H_