move favicon download code from chrome/ into content/

chrome/browser/favicon/favicon_download_helper_delegate.h

Index: chrome/browser/favicon/favicon_download_helper_delegate.h
diff --git a/chrome/browser/favicon/favicon_download_helper_delegate.h b/chrome/browser/favicon/favicon_download_helper_delegate.h
index ebdb5c2db312ecf82c4e795c3e94e837279504ba..d22b6b9de4f65a540d07073bfa968451d195c70e 100644
--- a/chrome/browser/favicon/favicon_download_helper_delegate.h
+++ b/chrome/browser/favicon/favicon_download_helper_delegate.h
@@ -11,7 +11,10 @@
 
 class GURL;
 class SkBitmap;
+
+namespace content {
 struct FaviconURL;
+}
 
 // This class provides a delegate interface for a FaviconDownloadHelper.  It
 // allows the FaviconDownloadHelper to pass favicon data back to its caller.
@@ -29,7 +32,7 @@ class FaviconDownloadHelperDelegate {
   // Message Handler.
   virtual void OnUpdateFaviconURL(
       int32 page_id,
-      const std::vector<FaviconURL>& candidates) {}
+      const std::vector<content::FaviconURL>& candidates) {}
 
  protected:
   virtual ~FaviconDownloadHelperDelegate() {}