IndexedDB: Numeric keys are floating point.

chrome/common/indexed_db_key.h

 // Copyright (c) 2010 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_COMMON_INDEXED_DB_KEY_H_
 #define CHROME_COMMON_INDEXED_DB_KEY_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebIDBKey.h"
 
 class IndexedDBKey {
  public:
   IndexedDBKey(); // Defaults to WebKit::WebIDBKey::InvalidType.
   explicit IndexedDBKey(const WebKit::WebIDBKey& key);
   ~IndexedDBKey();
 
   void SetNull();
   void SetInvalid();
   void Set(const string16& string);
-  void Set(int32_t number);
+  void Set(double number);
   void Set(const WebKit::WebIDBKey& key);
 
   WebKit::WebIDBKey::Type type() const { return type_; }
   const string16& string() const { return string_; }
-  int32_t number() const { return number_; }
+  double number() const { return number_; }
 
   operator WebKit::WebIDBKey() const;
 
  private:
   WebKit::WebIDBKey::Type type_;
   string16 string_;
-  int32_t number_;
+  double number_;
 };
 
 #endif  // CHROME_COMMON_INDEXED_DB_KEY_H_