Support POST in browser navaigation.

content/public/browser/page_navigator.h

Index: content/public/browser/page_navigator.h
===================================================================
--- content/public/browser/page_navigator.h	(revision 215511)
+++ content/public/browser/page_navigator.h	(working copy)
@@ -11,6 +11,8 @@
 
 #include <string>
 
+#include "base/memory/ref_counted.h"
+#include "base/memory/ref_counted_memory.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/global_request_id.h"
 #include "content/public/common/page_transition_types.h"
@@ -40,6 +42,15 @@
   GURL url;
   Referrer referrer;
 
+  // Indicates whether this navigation will be sent using POST.
+  // The POST method is limited support for basic POST data by leveraging
+  // NavigationController::LOAD_TYPE_BROWSER_INITIATED_HTTP_POST.
+  // It is not for things like file uploads.
+  bool uses_post;
+
+  // The post data when the navigation uses POST.
+  scoped_refptr<base::RefCountedMemory> browser_initiated_post_data;
+
   // Extra headers to add to the request for this page.  Headers are
   // represented as "<name>: <value>" and separated by \r\n.  The entire string
   // is terminated by \r\n.  May be empty if no extra headers are needed.
@@ -87,6 +98,6 @@
   virtual WebContents* OpenURL(const OpenURLParams& params) = 0;
 };
 
-}
+}  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PAGE_NAVIGATOR_H_