Make NavigationParams clearer

content/browser/frame_host/navigation_request.h

Index: content/browser/frame_host/navigation_request.h
diff --git a/content/browser/frame_host/navigation_request.h b/content/browser/frame_host/navigation_request.h
index 80c5fc7264e9b9ece474fc29863d8bc50d16e106..245bf03b5c5ae38c2deb356302c64ca0beddb076 100644
--- a/content/browser/frame_host/navigation_request.h
+++ b/content/browser/frame_host/navigation_request.h
@@ -17,7 +17,7 @@
 namespace content {
 
 class FrameTreeNode;
-class NavigationController;
+class NavigationControllerImpl;
 class NavigationURLLoader;
 class ResourceRequestBody;
 class SiteInstanceImpl;
@@ -90,10 +90,6 @@ class CONTENT_EXPORT NavigationRequest : public NavigationURLLoaderDelegate {
 
   const CommitNavigationParams& commit_params() const { return commit_params_; }
 
-  const HistoryNavigationParams& history_params() const {
-    return history_params_;
-  }
-
   NavigationURLLoader* loader_for_testing() const { return loader_.get(); }
 
   NavigationState state() const { return state_; }
@@ -126,7 +122,6 @@ class CONTENT_EXPORT NavigationRequest : public NavigationURLLoaderDelegate {
                     const CommonNavigationParams& common_params,
                     const BeginNavigationParams& begin_params,
                     const CommitNavigationParams& commit_params,
-                    const HistoryNavigationParams& history_params,
                     scoped_refptr<ResourceRequestBody> body,
                     bool browser_initiated,
                     const NavigationEntryImpl* navitation_entry);
@@ -150,7 +145,6 @@ class CONTENT_EXPORT NavigationRequest : public NavigationURLLoaderDelegate {
   CommonNavigationParams common_params_;
   const BeginNavigationParams begin_params_;
   const CommitNavigationParams commit_params_;
-  const HistoryNavigationParams history_params_;
   const bool browser_initiated_;
 
   NavigationState state_;