Fix incorrect map usage in the WebPluginImpl::didReceiveData function, which caused

a response to be incorrectly treated as a multipart response. This would eventually
end up sending the ViewHostMsg_DidStopLoading IPC to the browser, which would treat the
page as loaded, when it has not. 

This fixes http://code.google.com/p/chromium/issues/detail?id=7916, which would cause
the favicon to not show up on trunk.

Bug=7916


Review URL: http://codereview.chromium.org/28199

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@10499 0039d316-1c4b-4281-b951-d872f2087c98

webkit/glue/webplugin_impl.cc

@@ -1042,9 +1042,11 @@ void WebPluginImpl::didReceiveData(WebCore::ResourceHandle* handle,
                                    int length, int) {
   WebPluginResourceClient* client = GetClientFromHandle(handle);
   if (client) {
-    MultipartResponseDelegate* multi_part_handler =
-      multi_part_response_map_[client];
-    if (multi_part_handler) {
+    MultiPartResponseHandlerMap::iterator index =
+        multi_part_response_map_.find(client);
+    if (index != multi_part_response_map_.end()) {
+      MultipartResponseDelegate* multi_part_handler = (*index).second;
+      DCHECK(multi_part_handler != NULL);
       multi_part_handler->OnReceivedData(buffer, length);
     } else {
       client->DidReceiveData(buffer, length, 0);