Using largest favicon for shortcut when possible.

chrome/browser/android/shortcut_helper.h

Index: chrome/browser/android/shortcut_helper.h
diff --git a/chrome/browser/android/shortcut_helper.h b/chrome/browser/android/shortcut_helper.h
index 2fa2735d93bfcfeb8287c06a3cc372556a7ee903..323b409327a040e2dd8c57ebe717f9dbf72ff941 100644
--- a/chrome/browser/android/shortcut_helper.h
+++ b/chrome/browser/android/shortcut_helper.h
@@ -43,7 +43,8 @@ class ShortcutBuilder : public content::WebContentsObserver {
   };
 
   explicit ShortcutBuilder(content::WebContents* web_contents,
-                           const string16& title);
+                           const string16& title,
+                           int launcher_large_icon_size);
   virtual ~ShortcutBuilder() {}
 
   void OnDidRetrieveWebappInformation(bool success,
@@ -63,6 +64,7 @@ class ShortcutBuilder : public content::WebContentsObserver {
 
   GURL url_;
   string16 title_;
+  int launcher_large_icon_size_;
   ShortcutType shortcut_type_;
   CancelableTaskTracker cancelable_task_tracker_;
 
@@ -74,7 +76,8 @@ class ShortcutHelper {
   // Adds a shortcut to the current URL to the Android home screen, firing
   // background tasks to pull all the data required.
   static void AddShortcut(content::WebContents* web_contents,
-                          const string16& title);
+                          const string16& title,
+                          int launcher_larger_icon_size);
 
   // Adds a shortcut to the launcher.  Must be called from a WorkerPool task.
   static void AddShortcutInBackground(