Same as http://codereview.chromium.org/7282021/ after PNG has been added.

ui/resources/ui_resources.grd

Index: ui/resources/ui_resources.grd
diff --git a/ui/resources/ui_resources.grd b/ui/resources/ui_resources.grd
index 95a23ed4ab120523742402aaf84c1401340f32e3..1c3e60a1f85310352586f82d272e9fc224d02a79 100644
--- a/ui/resources/ui_resources.grd
+++ b/ui/resources/ui_resources.grd
@@ -28,7 +28,12 @@
       <include name="IDR_CONTENT_BOTTOM_RIGHT_CORNER" file="content_bottom_right_corner.png" type="BINDATA" />
       <include name="IDR_CONTENT_LEFT_SIDE" file="content_left_side.png" type="BINDATA" />
       <include name="IDR_CONTENT_RIGHT_SIDE" file="content_right_side.png" type="BINDATA" />
-      <include name="IDR_DEFAULT_FAVICON" file="default_favicon.png" type="BINDATA" />
+      <if expr="not pp_ifdef('touchui')">
+        <include name="IDR_DEFAULT_FAVICON" file="default_favicon.png" type="BINDATA" />
+      </if>
+      <if expr="pp_ifdef('touchui')">
+        <include name="IDR_DEFAULT_FAVICON" file="default_large_favicon.png" type="BINDATA" />
+      </if>
       <include name="IDR_FOLDER_CLOSED" file="folder_closed.png" type="BINDATA" />
       <include name="IDR_FOLDER_CLOSED_RTL" file="folder_closed_rtl.png" type="BINDATA" />
       <include name="IDR_FOLDER_OPEN" file="folder_open.png" type="BINDATA" />