InstantExtended: Add js api for custom logo.

chrome/browser/instant/instant_controller_delegate.h

Index: chrome/browser/instant/instant_controller_delegate.h
diff --git a/chrome/browser/instant/instant_controller_delegate.h b/chrome/browser/instant/instant_controller_delegate.h
index e37c852d5c6a7b9a0138992cacdd3cf6ef411e10..79dc677df207d265effc29b5dfbd155b57701e30 100644
--- a/chrome/browser/instant/instant_controller_delegate.h
+++ b/chrome/browser/instant/instant_controller_delegate.h
@@ -32,6 +32,9 @@ class InstantControllerDelegate {
   // new tab, based on |in_new_tab|. Delegate takes ownership of |preview|.
   virtual void CommitInstant(TabContents* preview, bool in_new_tab) = 0;
 
+  // Indicates whether the search provider has a custom logo for the NTP.
+  virtual void SetHasCustomLogo(bool has_logo) = 0;
+
   // Autocomplete the Instant suggested |text| into the omnibox, using the
   // specified |behavior| (see instant_types.h for details).
   virtual void SetSuggestedText(const string16& text,