Prevent renderer kills for in-page navigations on subframes.

content/renderer/render_frame_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 227 matching lines @@
   // when a compositor frame has committed.
   void DidCommitCompositorFrame();
 
   // Draw commands have been issued by RenderWidgetCompositor.
   void DidCommitAndDrawCompositorFrame();
 
   // TODO(jam): this is a temporary getter until all the code is transitioned
   // to using RenderFrame instead of RenderView.
   RenderViewImpl* render_view() { return render_view_.get(); }
 
+  const blink::WebHistoryItem& current_history_item() {
+    return current_history_item_;
+  }
+
   RendererWebCookieJarImpl* cookie_jar() { return &cookie_jar_; }
 
   // Returns the RenderWidget associated with this frame.
   RenderWidget* GetRenderWidget();
 
   DevToolsAgent* devtools_agent() { return devtools_agent_; }
 
   // This method must be called after the frame has been added to the frame
   // tree. It creates all objects that depend on the frame being at its proper
   // spot.
@@ skipping 987 matching lines @@
 #endif
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_