Make NavigationParams clearer

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 77b19aec12c3189b0578141f51bf5b5fa8868a9d..2f4796827cc1222a0fe6202c12d2fe97ff2f5309 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -102,8 +102,6 @@ struct CommitNavigationParams;
 struct CommonNavigationParams;
 struct CustomContextMenuContext;
 struct FrameReplicationState;
-struct HistoryNavigationParams;
-struct RequestNavigationParams;
 struct ResourceResponseHead;
 struct StartNavigationParams;
 
@@ -533,8 +531,7 @@ class CONTENT_EXPORT RenderFrameImpl
   // this back to private member.
   void OnNavigate(const CommonNavigationParams& common_params,
                   const StartNavigationParams& start_params,
-                  const CommitNavigationParams& commit_params,
-                  const HistoryNavigationParams& history_params);
+                  const CommitNavigationParams& commit_params);
 
   // Make this frame show an empty, unscriptable page.
   // TODO(nasko): Remove this method once swapped out state is no longer used.
@@ -642,8 +639,7 @@ class CONTENT_EXPORT RenderFrameImpl
   void OnCommitNavigation(const ResourceResponseHead& response,
                           const GURL& stream_url,
                           const CommonNavigationParams& common_params,
-                          const CommitNavigationParams& commit_params,
-                          const HistoryNavigationParams& history_params);
+                          const CommitNavigationParams& commit_params);
 
   // Virtual since overridden by WebTestProxy for layout tests.
   virtual blink::WebNavigationPolicy DecidePolicyForNavigation(
@@ -710,7 +706,7 @@ class CONTENT_EXPORT RenderFrameImpl
   bool PrepareRenderViewForNavigation(
       const GURL& url,
       bool is_history_navigation,
-      const HistoryNavigationParams& history_params,
+      const CommitNavigationParams& commit_params,
       bool* is_reload,
       blink::WebURLRequest::CachePolicy* cache_policy);