[Mac] Desaturate the Favicon for Network Errors

chrome/browser/favicon/favicon_utils.h

Index: chrome/browser/favicon/favicon_utils.h
diff --git a/chrome/browser/favicon/favicon_utils.h b/chrome/browser/favicon/favicon_utils.h
index e8b8ad01a6e9cb9fbe0799378fc5eb775c76ef51..e985c0ea9620a756dc3da9e6c351471917e79e02 100644
--- a/chrome/browser/favicon/favicon_utils.h
+++ b/chrome/browser/favicon/favicon_utils.h
@@ -7,6 +7,14 @@
 
 #include "components/favicon/content/content_favicon_driver.h"
 
+namespace content {
+class WebContents;
+}  // namespace content
+
+namespace gfx {
+class Image;
+}  // namespace gfx
+
 namespace favicon {
 
 // Creates a ContentFaviconDriver and associates it with |web_contents| if none
@@ -21,6 +29,10 @@ void CreateContentFaviconDriverForWebContents(
 // space is provided for the favicon, and the favicon is never displayed.
 bool ShouldDisplayFavicon(content::WebContents* web_contents);
 
+// Retrieves the favicon from given WebContents. If contents contain a
+// network error, desaturate the favicon.
+gfx::Image TabFaviconFromWebContents(content::WebContents* contents);
+
 }  // namespace favicon
 
 #endif  // CHROME_BROWSER_FAVICON_FAVICON_UTILS_H_