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diff --git a/chromium/content/browser/gpu/shader_disk_cache.h b/chromium/content/browser/gpu/shader_disk_cache.h
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+++ b/chromium/content/browser/gpu/shader_disk_cache.h
@@ -0,0 +1,154 @@
+// Copyright (c) 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.
+
+#ifndef CONTENT_BROWSER_GPU_SHADER_DISK_CACHE_H_
+#define CONTENT_BROWSER_GPU_SHADER_DISK_CACHE_H_
+
+#include <map>
+#include <queue>
+#include <string>
+
+#include "base/files/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/singleton.h"
+#include "content/common/content_export.h"
+#include "net/disk_cache/disk_cache.h"
+
+namespace content {
+
+class ShaderDiskCacheEntry;
+class ShaderDiskReadHelper;
+class ShaderClearHelper;
+
+// ShaderDiskCache is the interface to the on disk cache for
+// GL shaders.
+//
+// While this class is both RefCounted and SupportsWeakPtr
+// when using this class you should work with the RefCounting.
+// The WeakPtr is needed interally.
+class CONTENT_EXPORT ShaderDiskCache
+    : public base::RefCounted<ShaderDiskCache>,
+      public base::SupportsWeakPtr<ShaderDiskCache> {
+ public:
+  void Init();
+
+  void set_host_id(int host_id) { host_id_ = host_id; }
+
+  // Store the |shader| into the cache under |key|.
+  void Cache(const std::string& key, const std::string& shader);
+
+  // Clear a range of entries. This supports unbounded deletes in either
+  // direction by using null Time values for either |begin_time| or |end_time|.
+  // The return value is a net error code. If this method returns
+  // ERR_IO_PENDING, the |completion_callback| will be invoked when the
+  // operation completes.
+  int Clear(
+      const base::Time begin_time,
+      const base::Time end_time,
+      const net::CompletionCallback& completion_callback);
+
+  // Sets a callback for when the cache is available. If the cache is
+  // already available the callback will not be called and net::OK is returned.
+  // If the callback is set net::ERR_IO_PENDING is returned and the callback
+  // will be executed when the cache is available.
+  int SetAvailableCallback(const net::CompletionCallback& callback);
+
+  // Returns the number of elements currently in the cache.
+  int32 Size();
+
+  // Set a callback notification for when all current entries have been
+  // written to the cache.
+  // The return value is a net error code. If this method returns
+  // ERR_IO_PENDING, the |callback| will be invoked when all entries have
+  // been written to the cache.
+  int SetCacheCompleteCallback(const net::CompletionCallback& callback);
+
+ private:
+  friend class base::RefCounted<ShaderDiskCache>;
+  friend class ShaderDiskCacheEntry;
+  friend class ShaderDiskReadHelper;
+  friend class ShaderCacheFactory;
+
+  explicit ShaderDiskCache(const base::FilePath& cache_path);
+  ~ShaderDiskCache();
+
+  void CacheCreatedCallback(int rv);
+
+  disk_cache::Backend* backend() { return backend_.get(); }
+
+  void EntryComplete(void* entry);
+  void ReadComplete();
+
+  bool cache_available_;
+  int host_id_;
+  base::FilePath cache_path_;
+  bool is_initialized_;
+  net::CompletionCallback available_callback_;
+  net::CompletionCallback cache_complete_callback_;
+
+  scoped_ptr<disk_cache::Backend> backend_;
+
+  scoped_refptr<ShaderDiskReadHelper> helper_;
+  std::map<void*, scoped_refptr<ShaderDiskCacheEntry> > entry_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShaderDiskCache);
+};
+
+// ShaderCacheFactory maintains a cache of ShaderDiskCache objects
+// so we only create one per profile directory.
+class CONTENT_EXPORT ShaderCacheFactory {
+ public:
+  static ShaderCacheFactory* GetInstance();
+
+  // Clear the shader disk cache for the given |path|. This supports unbounded
+  // deletes in either direction by using null Time values for either
+  // |begin_time| or |end_time|. The |callback| will be executed when the
+  // clear is complete.
+  void ClearByPath(const base::FilePath& path,
+                   const base::Time& begin_time,
+                   const base::Time& end_time,
+                   const base::Closure& callback);
+
+  // Retrieve the shader disk cache for the provided |client_id|.
+  scoped_refptr<ShaderDiskCache> Get(int32 client_id);
+
+  // Set the |path| to be used for the disk cache for |client_id|.
+  void SetCacheInfo(int32 client_id, const base::FilePath& path);
+
+  // Remove the path mapping for |client_id|.
+  void RemoveCacheInfo(int32 client_id);
+
+  // Set the provided |cache| into the cache map for the given |path|.
+  void AddToCache(const base::FilePath& path, ShaderDiskCache* cache);
+
+  // Remove the provided |path| from our cache map.
+  void RemoveFromCache(const base::FilePath& path);
+
+ private:
+  friend struct DefaultSingletonTraits<ShaderCacheFactory>;
+  friend class ShaderClearHelper;
+
+  ShaderCacheFactory();
+  ~ShaderCacheFactory();
+
+  scoped_refptr<ShaderDiskCache> GetByPath(const base::FilePath& path);
+  void CacheCleared(const base::FilePath& path);
+
+  typedef std::map<base::FilePath, ShaderDiskCache*> ShaderCacheMap;
+  ShaderCacheMap shader_cache_map_;
+
+  typedef std::map<int32, base::FilePath> ClientIdToPathMap;
+  ClientIdToPathMap client_id_to_path_map_;
+
+  typedef std::queue<scoped_refptr<ShaderClearHelper> > ShaderClearQueue;
+  typedef std::map<base::FilePath, ShaderClearQueue> ShaderClearMap;
+  ShaderClearMap shader_clear_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShaderCacheFactory);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_GPU_SHADER_DISK_CACHE_H_
+