Move LoadProgressTracker to the browser process.

content/browser/renderer_host/render_view_host_delegate.h

Index: content/browser/renderer_host/render_view_host_delegate.h
diff --git a/content/browser/renderer_host/render_view_host_delegate.h b/content/browser/renderer_host/render_view_host_delegate.h
index aa7a0eb39fc51e35cd9680ef45ad9bef749d0dde..d28b934f18aa741c7160e466f78f67c5e8ec687c 100644
--- a/content/browser/renderer_host/render_view_host_delegate.h
+++ b/content/browser/renderer_host/render_view_host_delegate.h
@@ -135,11 +135,6 @@ class CONTENT_EXPORT RenderViewHostDelegate {
   // The pending page load was canceled.
   virtual void DidCancelLoading() {}
 
-  // The RenderView made progress loading a page's top frame.
-  // |progress| is a value between 0 (nothing loaded) to 1.0 (top frame
-  // entirely loaded).
-  virtual void DidChangeLoadProgress(double progress) {}
-
   // The RenderView's main frame document element is ready. This happens when
   // the document has finished parsing.
   virtual void DocumentAvailableInMainFrame(RenderViewHost* render_view_host) {}