Add UploadProgressTracker unittest

content/browser/loader/async_resource_handler.h

Index: content/browser/loader/async_resource_handler.h
diff --git a/content/browser/loader/async_resource_handler.h b/content/browser/loader/async_resource_handler.h
index fb69ec7bc1e59a02d8b1dc2ac617b47cdfceebb1..dbf3b03503a43e5652e5d4a2259a4b4fffc5b263 100644
--- a/content/browser/loader/async_resource_handler.h
+++ b/content/browser/loader/async_resource_handler.h
@@ -20,6 +20,7 @@
 
 namespace net {
 class URLRequest;
+class UploadProgress;
 }
 
 namespace content {
@@ -67,7 +68,7 @@ class CONTENT_EXPORT AsyncResourceHandler : public ResourceHandler,
   int CalculateEncodedDataLengthToReport();
   int CalculateEncodedBodyLengthToReport();
   void RecordHistogram();
-  void SendUploadProgress(int64_t current_position, int64_t total_size);
+  void SendUploadProgress(const net::UploadProgress& progress);
 
   scoped_refptr<ResourceBuffer> buffer_;
   ResourceDispatcherHostImpl* rdh_;