Adding possibility for client to upload the file

This CL adds three features that will allow the client to upload the report
file.
Three main modifications are made :
- Allow upload url to have a file:// scheme, and write the HTTP request to file
  in that case
- Split the request in two parts in case of a file:// scheme, the request
  time and the response time. A new API [handleNetworkResponse] is added.
- Give the opportunity to the client to get the configuration NSDictionary
  to be able to recreate the breakpad context at response time.

Patch by Olivier Robin <olivierrobin@chromium.org>

Review URL: https://breakpad.appspot.com/2764002/

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1368 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/common/mac/HTTPMultipartUpload.m

@@ -143,7 +143,7 @@
 
 //=============================================================================
 - (NSData *)send:(NSError **)error {
-  NSMutableURLRequest *req = 
+  NSMutableURLRequest *req =
     [[NSMutableURLRequest alloc]
           initWithURL:url_ cachePolicy:NSURLRequestUseProtocolCachePolicy
       timeoutInterval:10.0 ];
@@ -190,12 +190,16 @@
 
   [response_ release];
   response_ = nil;
-  
-  NSData *data =  [NSURLConnection sendSynchronousRequest:req
-                               returningResponse:&response_
-                                           error:error];
 
-  [response_ retain];
+  NSData *data;
+  if ([[req URL] isFileURL]) {
+    [[req HTTPBody] writeToURL:[req URL] options:0 error:error];
+  } else {
+    data = [NSURLConnection sendSynchronousRequest:req
+                                 returningResponse:&response_
+                                             error:error];
+    [response_ retain];
+  }
   [req release];
 
   return data;