PlzNavigate: Fix the http/tests/loading/307-after-303-after-post.html and the http/tests/loading/re…

third_party/WebKit/public/web/WebDataSource.h

Index: third_party/WebKit/public/web/WebDataSource.h
diff --git a/third_party/WebKit/public/web/WebDataSource.h b/third_party/WebKit/public/web/WebDataSource.h
index c2b118ac412d890aa7cae91a3567237a17774b19..3ef4bbb56da27e27a38dd263cfee5542631be330 100644
--- a/third_party/WebKit/public/web/WebDataSource.h
+++ b/third_party/WebKit/public/web/WebDataSource.h
@@ -60,6 +60,10 @@ class WebDataSource {
   // to a location specified by a redirect that was followed.
   virtual const WebURLRequest& getRequest() const = 0;
 
+  // Returns the request corresponding to this data source. The caller can
+  // modify this request.
+  virtual WebURLRequest& getRequestWritable() = 0;

[Nate Chapin, 2017/03/06 19:16:03]

Rather than exposing this as a one-off, let's pass the WebURLRequest as a
parameter on didStartProvisionalLoad.

[ananta, 2017/03/06 22:42:05]

Done.

+
   // Returns the response associated with this datasource.
   virtual const WebURLResponse& response() const = 0;