Add methods to NavigationHandle to allow refactoring webNavigation to use it.

content/public/browser/navigation_handle.h

Index: content/public/browser/navigation_handle.h
diff --git a/content/public/browser/navigation_handle.h b/content/public/browser/navigation_handle.h
index 8d0c6d98a2e7fb3c0d41e0292a3c592a8df25bc4..43f6a989e9a2a7a28529d1bbe3c912aee00637cb 100644
--- a/content/public/browser/navigation_handle.h
+++ b/content/public/browser/navigation_handle.h
@@ -41,6 +41,29 @@ class CONTENT_EXPORT NavigationHandle {
   // This remains constant over the navigation lifetime.
   virtual bool IsInMainFrame() = 0;
 
+  // Whether the navigation is taking place in a frame that is a direct child
+  // of the main frame. This remains constant over the navigation lifetime.
+  virtual bool IsParentMainFrame() = 0;
+
+  // Whether the navigation is synchronous or not. Examples of synchronous
+  // navigations are:
+  // * reference fragment navigations
+  // * pushState/popState
+  virtual bool IsSynchronousNavigation() = 0;
+
+  // Whether the navigation is for an iframe with srcdoc attribute.
+  virtual bool IsSrcdoc() = 0;
+
+  // Returns the FrameTreeNode ID for the frame in which the navigation is
+  // performed. This ID is browser-global and uniquely identifies a frame that
+  // hosts content. The identifier is fixed at the creation of the frame and
+  // stays constant for the lifetime of the frame.
+  virtual int GetFrameTreeNodeId() = 0;
+
+  // Retruns the FrameTreeNode ID for the parent frame. If this navigation is

[clamy, 2016/02/08 12:54:58]

nit: s/retruns/returns

[nasko, 2016/02/08 16:58:55]

Done.

+  // taking place in the main frame, the value returned is -1.
+  virtual int GetParentFrameTreeNodeId() = 0;
+
   // The WebContents the navigation is taking place in.
   WebContents* GetWebContents();
 
@@ -90,6 +113,9 @@ class CONTENT_EXPORT NavigationHandle {
   // before the navigation has committed.
   virtual bool IsSamePage() = 0;
 
+  // Whether the navigation has encountered a server redirect or not.
+  virtual bool WasServerRedirect() = 0;
+
   // Whether the navigation has committed. This returns true for either
   // successful commits or error pages that replace the previous page
   // (distinguished by |IsErrorPage|), and false for errors that leave the user