A speculative Revert for r165872 - Remove static thread pointers from CC, attempt 2

cc/resource_provider.h

 // Copyright 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.
 
 #ifndef CC_RESOURCE_PROVIDER_H_
 #define CC_RESOURCE_PROVIDER_H_
 
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/threading/thread_checker.h"
 #include "cc/cc_export.h"
 #include "cc/graphics_context.h"
 #include "cc/texture_copier.h"
 #include "cc/transferable_resource.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/gfx/size.h"
 #include <deque>
 #include <vector>
 
 namespace WebKit {
 class WebGraphicsContext3D;
 }
 
 namespace gfx {
 class Rect;
 class Vector2d;
 }
 
 namespace cc {
 
 class TextureUploader;
 
-// This class is not thread-safe and can only be called from the thread it was
-// created on (in practice, the impl thread).
+// Thread-safety notes: this class is not thread-safe and can only be called
+// from the thread it was created on (in practice, the compositor thread).
 class CC_EXPORT ResourceProvider {
 public:
     typedef unsigned ResourceId;
     typedef std::vector<ResourceId> ResourceIdArray;
     typedef base::hash_map<ResourceId, ResourceId> ResourceIdMap;
     enum TextureUsageHint { TextureUsageAny, TextureUsageFramebuffer };
     enum ResourceType {
         GLTexture = 1,
         Bitmap,
     };
@@ skipping 208 matching lines @@
     std::deque<Mailbox> m_mailboxes;
 
     ResourceType m_defaultResourceType;
     bool m_useTextureStorageExt;
     bool m_useTextureUsageHint;
     bool m_useShallowFlush;
     scoped_ptr<TextureUploader> m_textureUploader;
     scoped_ptr<AcceleratedTextureCopier> m_textureCopier;
     int m_maxTextureSize;
 
-    base::ThreadChecker m_threadChecker;
-
     DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }
 
 #endif  // CC_RESOURCE_PROVIDER_H_