Add const accessors to URLRequest and UploadData.

net/base/upload_data.h

 // Copyright (c) 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 NET_BASE_UPLOAD_DATA_H_
 #define NET_BASE_UPLOAD_DATA_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 205 matching lines @@
 
   // Returns true if the upload data is entirely in memory (i.e. the
   // upload data is not chunked, and all elemnts are of TYPE_BYTES).
   bool IsInMemory() const;
 
   // Resets the offset of each upload data element to zero, so that the
   // upload data can be reread. This can happen if the same upload data is
   // reused for a new UploadDataStream.
   void ResetOffset();
 
-  std::vector<Element>* elements() {
+  const std::vector<Element>* elements() const {
     return &elements_;
   }
 
+  std::vector<Element>* elements_mutable() {
+    return &elements_;
+  }
+
   void SetElements(const std::vector<Element>& elements);
 
   void swap_elements(std::vector<Element>* elements) {
     elements_.swap(*elements);
   }
 
   // Identifies a particular upload instance, which is used by the cache to
   // formulate a cache key.  This value should be unique across browser
   // sessions.  A value of 0 is used to indicate an unspecified identifier.
   void set_identifier(int64 id) { identifier_ = id; }
@@ skipping 36 matching lines @@
 
 inline bool operator!=(const UploadData::Element& a,
                        const UploadData::Element& b) {
   return !(a == b);
 }
 #endif  // defined(UNIT_TEST)
 
 }  // namespace net
 
 #endif  // NET_BASE_UPLOAD_DATA_H_