Create a content::ResourceContext.

base/debug/stack_trace.h

 // Copyright (c) 2011 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 BASE_DEBUG_STACK_TRACE_H_
 #define BASE_DEBUG_STACK_TRACE_H_
 #pragma once
 
 #include <iosfwd>
 
@@ skipping 24 matching lines @@
 
   // Copying and assignment are allowed with the default functions.
 
   ~StackTrace();
 
   // Gets an array of instruction pointer values. |*count| will be set to the
   // number of elements in the returned array.
   const void* const* Addresses(size_t* count);
 
   // Prints a backtrace to stderr
-  void PrintBacktrace();
+  void PrintBacktrace() const;
 
   // Resolves backtrace to symbols and write to stream.
-  void OutputToStream(std::ostream* os);
+  void OutputToStream(std::ostream* os) const;
 
  private:
   // From http://msdn.microsoft.com/en-us/library/bb204633.aspx,
   // the sum of FramesToSkip and FramesToCapture must be less than 63,
   // so set it to 62. Even if on POSIX it could be a larger value, it usually
   // doesn't give much more information.
   static const int kMaxTraces = 62;
 
   void* trace_[kMaxTraces];
   int count_;
 };
 
 }  // namespace debug
 }  // namespace base
 
 #endif  // BASE_DEBUG_STACK_TRACE_H_