Cleanup: Remove "gray text" logic from Omnibox

components/omnibox/browser/omnibox_view.h

Index: components/omnibox/browser/omnibox_view.h
diff --git a/components/omnibox/browser/omnibox_view.h b/components/omnibox/browser/omnibox_view.h
index 5245445a1b0292b0329c9752b625ce105b25b3c2..12f8e3c506f232d086a8010d496d53b45b03e67e 100644
--- a/components/omnibox/browser/omnibox_view.h
+++ b/components/omnibox/browser/omnibox_view.h
@@ -189,12 +189,6 @@ class OmniboxView {
   // the top-most window is the relative window.
   virtual gfx::NativeView GetRelativeWindowForPopup() const = 0;
 
-  // Shows |input| as gray suggested text after what the user has typed.
-  virtual void SetGrayTextAutocompletion(const base::string16& input) = 0;
-
-  // Returns the current gray suggested text.
-  virtual base::string16 GetGrayTextAutocompletion() const = 0;
-
   // Returns the width in pixels needed to display the current text. The
   // returned value includes margins.
   virtual int GetTextWidth() const = 0;