Update shelf spacing in Chrome OS according to the MD specs

chrome/browser/ui/ash/launcher/launcher_favicon_loader.cc

Index: chrome/browser/ui/ash/launcher/launcher_favicon_loader.cc
diff --git a/chrome/browser/ui/ash/launcher/launcher_favicon_loader.cc b/chrome/browser/ui/ash/launcher/launcher_favicon_loader.cc
index 243a8e8b24826fca7b38cb42b65580887bbee2b1..7549eeda2e422e844481fa7e7227f95188fb06df 100644
--- a/chrome/browser/ui/ash/launcher/launcher_favicon_loader.cc
+++ b/chrome/browser/ui/ash/launcher/launcher_favicon_loader.cc
@@ -22,7 +22,8 @@ const int kMaxBitmapSize = 256;
 ////////////////////////////////////////////////////////////////////////////////
 // FaviconRawBitmapHandler fetchs all bitmaps with the 'icon' (or 'shortcut
 // icon')
-// link tag, storing the one that best matches ash::kShelfSize.
+// link tag, storing the one that best matches
+// ash::ShelfLayoutConstant::SHELF_SIZE.
 // These icon bitmaps are not resized and are not cached beyond the lifetime
 // of the class. Bitmaps larger than kMaxBitmapSize are ignored.
 
@@ -145,7 +146,7 @@ void FaviconRawBitmapHandler::AddFavicon(const GURL& image_url,
   if (new_bitmap.height() > kMaxBitmapSize ||
       new_bitmap.width() > kMaxBitmapSize)
     return;
-  if (new_bitmap.height() < ash::kShelfSize)
+  if (new_bitmap.height() < ash::GetShelfConstant(ash::SHELF_SIZE))
     return;
   if (!bitmap_.isNull()) {
     // We want the smallest icon that is large enough.