Change URLRequest to use a ref-counted buffer for actual IO....

chrome/common/net/url_request_intercept_job.h

Index: chrome/common/net/url_request_intercept_job.h
===================================================================
--- chrome/common/net/url_request_intercept_job.h	(revision 8565)
+++ chrome/common/net/url_request_intercept_job.h	(working copy)
@@ -34,7 +34,7 @@
   // URLRequestJob
   virtual void Start();
   virtual void Kill();
-  virtual bool ReadRawData(char* buf, int buf_size, int* bytes_read);
+  virtual bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read);
   virtual bool GetMimeType(std::string* mime_type);
   virtual bool GetCharset(std::string* charset);
   virtual void GetResponseInfo(net::HttpResponseInfo* info);
@@ -53,7 +53,7 @@
   scoped_ptr<ScopableCPRequest> cprequest_;
   ChromePluginLib* plugin_;
   bool got_headers_;
-  char* read_buffer_;
+  net::IOBuffer* read_buffer_;
   int read_buffer_size_;
 
   DISALLOW_EVIL_CONSTRUCTORS(URLRequestInterceptJob);