move favicon download code from chrome/ into content/

chrome/browser/favicon/favicon_util.h

Index: chrome/browser/favicon/favicon_util.h
diff --git a/chrome/browser/favicon/favicon_util.h b/chrome/browser/favicon/favicon_util.h
index b6a94a65c536fd417867970b11ad2aa843c1f723..91839f712d953753ba3a500729f86be07403b44f 100644
--- a/chrome/browser/favicon/favicon_util.h
+++ b/chrome/browser/favicon/favicon_util.h
@@ -32,15 +32,6 @@ class FaviconUtil {
   // the default favicon.
   static std::vector<ui::ScaleFactor> GetFaviconScaleFactors();
 
-  // Starts the download of the given favicon |url| from the given render view
-  // host. When the download is finished, an IconHostMsg_DidDownloadFavicon IPC
-  // message will be sent.
-  // Returns the unique id of the download request. The id will be sent in the
-  // IPC message.
-  static int DownloadFavicon(content::RenderViewHost* rvh,
-                             const GURL& url,
-                             int image_size);
-
   // Takes a vector of png-encoded frames, decodes them, and converts them to
   // a favicon of size favicon_size (in DIPs) at the desired ui scale factors.
   static gfx::Image SelectFaviconFramesFromPNGs(