Mac: Fix icons in download dom UI

chrome/browser/icon_loader_linux.cc

Index: chrome/browser/icon_loader_linux.cc
diff --git a/chrome/browser/icon_loader_linux.cc b/chrome/browser/icon_loader_linux.cc
index ce8eade5e7573ef7c12a7288381fc330a595b0bc..c5b04237187935ba498e73c9eddc80ad1baf87b9 100644
--- a/chrome/browser/icon_loader_linux.cc
+++ b/chrome/browser/icon_loader_linux.cc
@@ -16,12 +16,20 @@
 #include "base/string_util.h"
 
 static int SizeToInt(IconLoader::IconSize size) {
-  int pixels = 48;
-  if (size == IconLoader::NORMAL)
-    pixels = 32;
-  else if (size == IconLoader::SMALL)
-    pixels = 16;
-
+  int pixels = 0;
+  switch (size) {
+    case IconLoader::SMALL:
+      pixels = 16;
+      break;
+    case IconLoader::NORMAL:
+      pixels = 32;
+      break;
+    case IconLoader::LARGE:
+      pixels = 48;
+      break;
+    default:
+      NOTREACHED();
+  }
   return pixels;
 }