Support POST in browser navaigation.

chrome/browser/ui/browser_navigator.h

Index: chrome/browser/ui/browser_navigator.h
===================================================================
--- chrome/browser/ui/browser_navigator.h	(revision 214769)
+++ chrome/browser/ui/browser_navigator.h	(working copy)
@@ -212,6 +212,12 @@
   // navigation entry.
   bool should_replace_current_entry;
 
+  // Indicates whether this navigation will be sent using POST.
+  bool uses_post;

[Nico, 2013/07/31 21:25:43]

Don't we have the concept of "this navigation uses post data" somewhere already,
for the "this was a post request, do you really want to reload?" dialog when
reloading a POST page (or going back in history to a post page)? Is that history
only? How does that work?

Does this here interact sanely with history / repost dialogs?

[Johnny(Jianning) Ding, 2013/07/31 21:49:34]

The logic is in NavigationController, right? See
https://code.google.com/p/chromium/codesearch#chromium/src/content/browser/we...

NavigationController does support POST, but PageNavigator and its subclass
WebContents->Browser::OpenURL doesn't, that is why I have this change

+
+  // The post data when the navigation uses POST.
+  std::string post_data;
+
  private:
   NavigateParams();
 };