Make Resource::resourceBuffer() to return PassRefPtr<const SharedBuffer>

third_party/WebKit/Source/bindings/core/v8/ScriptStreamer.cpp

 // Copyright 2014 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 "bindings/core/v8/ScriptStreamer.h"
 
 #include "bindings/core/v8/ScriptStreamerThread.h"
 #include "bindings/core/v8/V8ScriptRunner.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
@@ skipping 354 matching lines @@
 
     // For coordinating between the main thread and background thread tasks.
     // Guards m_cancelled and m_queueTailPosition.
     Mutex m_mutex;
 
     // The shared buffer containing the resource data + state variables.
     // Used by both threads, guarded by m_mutex.
     bool m_cancelled;
     bool m_finished;
 
-    RefPtr<SharedBuffer> m_resourceBuffer; // Only used by the main thread.
+    RefPtr<const SharedBuffer> m_resourceBuffer; // Only used by the main thread.
 
     // The queue contains the data to be passed to the V8 thread.
     //   queueLeadPosition: data we have handed off to the V8 thread.
     //   queueTailPosition: end of data we have enqued in the queue.
     //   bookmarkPosition: position of the bookmark.
     SourceStreamDataQueue m_dataQueue; // Thread safe.
     size_t m_queueLeadPosition; // Only used by v8 thread.
     size_t m_queueTailPosition; // Used by both threads; guarded by m_mutex.
     size_t m_bookmarkPosition; // Only used by v8 thread.
 
@@ skipping 302 matching lines @@
 
     // The Resource might go out of scope if the script is no longer
     // needed. This makes PendingScript notify the ScriptStreamer when it is
     // destroyed.
     script->setStreamer(ScriptStreamer::create(script, scriptType, scriptState, compileOption, loadingTaskRunner));
 
     return true;
 }
 
 } // namespace blink