[Icons NTP] Working prototype to fetch, store, and display big icons.

chrome/renderer/searchbox/searchbox.h

Index: chrome/renderer/searchbox/searchbox.h
diff --git a/chrome/renderer/searchbox/searchbox.h b/chrome/renderer/searchbox/searchbox.h
index d0821ca5aedcb6fdca58af359f6b58e90d44c10d..c27538911049bfb3798976231e5370b4c6ead52e 100644
--- a/chrome/renderer/searchbox/searchbox.h
+++ b/chrome/renderer/searchbox/searchbox.h
@@ -58,6 +58,12 @@ class SearchBox : public content::RenderViewObserver,
   bool GenerateFaviconURLFromTransientURL(const GURL& transient_url,
                                           GURL* url) const;
 
+  bool GenerateBigIconURLFromTransientURL(const GURL& transient_url,
+                                          GURL* url) const;
+
+  bool GenerateFallbackIconURLFromTransientURL(const GURL& transient_url,
+                                               GURL* url) const;
+
   // Generates the thumbnail URL of the most visited item specified by the
   // |transient_url|. If the |transient_url| is valid, returns true and fills in
   // |url|. If the |transient_url| is invalid, returns false  and |url| is not