Moved XMPP notifier library from chrome/browser/sync to chrome/common....

chrome/browser/sync/notifier/base/fastalloc.h

-// Copyright (c) 2009 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 CHROME_BROWSER_SYNC_NOTIFIER_BASE_FASTALLOC_H_
-#define CHROME_BROWSER_SYNC_NOTIFIER_BASE_FASTALLOC_H_
-
-#include <assert.h>
-
-namespace notifier {
-
-template<class T, size_t Size>
-class FastAlloc {
- public:
-  FastAlloc() : buffer_(NULL), size_(0) { }
-  ~FastAlloc() { freeBuffer(); }
-  T* get_buffer(size_t size) {
-    if (size_ != 0) {
-      // We only allow one call to get_buffer. This makes the logic here
-      // simpler, and the user has to worry less about someone else calling
-      // get_buffer again on the same FastAlloc object and invalidating the
-      // memory they were using.
-      assert(false && "get_buffer may one be called once");
-      return NULL;
-    }
-
-    if (size <= Size) {
-      buffer_ = internal_buffer_;
-    } else {
-      buffer_ = new T[size];
-    }
-
-    if (buffer_ != NULL) {
-      size_ = size;
-    }
-    return buffer_;
-  }
-
- private:
-  void freeBuffer() {
-#if defined(DEBUG)
-    memset(buffer_, 0xCC, size_ * sizeof(T));
-#endif
-
-    if (buffer_ != NULL && buffer_ != internal_buffer_) {
-      delete[] buffer_;
-    }
-    buffer_ = NULL;
-    size_ = 0;
-  }
-
-  T* buffer_;
-  T internal_buffer_[Size];
-  size_t size_;
-};
-
-}
-
-#endif  // CHROME_BROWSER_SYNC_NOTIFIER_BASE_FASTALLOC_H_