[Password Manager] Copiable username and origin. Linkable origin elided from the left.

chrome/browser/ui/webui/large_icon_source.h

Index: chrome/browser/ui/webui/large_icon_source.h
diff --git a/chrome/browser/ui/webui/large_icon_source.h b/chrome/browser/ui/webui/large_icon_source.h
index fb573ea45f6d63a76843bc80e10925dacf663775..55bd014db75c2dcadeeacf7b0d8c6bd402147a81 100644
--- a/chrome/browser/ui/webui/large_icon_source.h
+++ b/chrome/browser/ui/webui/large_icon_source.h
@@ -25,15 +25,24 @@ struct LargeIconResult;
 //
 // Format:
 //   chrome://large-icon/size/url
+// or
+//   chrome://large-icon/size/fallback/fallback_params/url
 //
 // Parameter:
 //  'size'             Required (including trailing '/')
 //    Positive integer to specify the large icon's size in pixels.
+//  fallback_params    Optional
+//    5 comma-separated parameters of fallback icon in the format described at
+//    the top of the file "chrome/browser/ui/webui/fallback_icon_source.h".
 //  'url'              Optional
 //    String to specify the page URL of the large icon.
 //
-//  Example: chrome://large-icon/48/http://www.google.com/
-//    This requests a 48x48 large icon for http://www.google.com.
+//  Examples:
+//    chrome://large-icon/48/http://www.google.com/
+//      This requests a 48x48 large icon for http://www.google.com.
+//    chrome://large-icon/16/fallback/,777,FFF,0.625,0.4/http://example.com

[Evan Stade, 2015/10/15 23:46:32]

I don't think you should be passing this fallback stuff into C++, can't you do
this all in css?

see how multiple background urls can be used as a fallback in case one fails to
load: https://jsfiddle.net/82oqoepe/1/

[kolos1, 2015/10/16 14:19:25]

Thanks. That is very interesting idea, but what if the regular icon is partially
transparent. Is it possible to disable transparency of a background image? I
didn't find so far.

+//      If there is no icon for example.com, the style of fallback icon will be
+//      specified with listed parameters.
 class LargeIconSource : public content::URLDataSource {
  public:
   // |fallback_icon_service| and |large_icon_service| are owned by caller and