Hide location bar on Javascript-initiated scroll.

content/public/browser/web_contents_delegate.h

Index: content/public/browser/web_contents_delegate.h
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index 60732ceb0905956441182ff4b3973dcaa67357af..8db5039e1fa40d021d316b8683b0207296c699f6 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -20,6 +20,7 @@
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect_f.h"
+#include "ui/gfx/vector2d.h"
 
 class GURL;
 
@@ -342,6 +343,10 @@ class CONTENT_EXPORT WebContentsDelegate {
   virtual bool IsFullscreenForTabOrPending(
       const WebContents* web_contents) const;
 
+  // Called when the renderer has scrolled programmatically.
+  virtual void DidProgrammaticallyScroll(WebContents* web_contents,
+                                         const gfx::Vector2d& scroll_point) {}
+
   // Called when a Javascript out of memory notification is received.
   virtual void JSOutOfMemory(WebContents* web_contents) {}