Plumb file system permission into WebviewGuest.

tools/metrics/actions/actions.xml

Index: tools/metrics/actions/actions.xml
diff --git a/tools/metrics/actions/actions.xml b/tools/metrics/actions/actions.xml
index a9a5eea88e8b916717599c905a271ef05cab65dc..77c8c46843a44d223e60bece2f5df4c4256b98ac 100644
--- a/tools/metrics/actions/actions.xml
+++ b/tools/metrics/actions/actions.xml
@@ -10835,6 +10835,11 @@ should be able to be added at any place in this file.
   </description>
 </action>
 
+<action name="WebView.PermissionAllow.FileSystem">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>

[Alexei Svitkine (slow), 2014/06/03 14:18:35]

Please fill out these fields by setting yourself as owner and providing a
description. Thanks!

[Xi Han, 2014/06/03 15:25:51]

Done.

+  <description>Please enter the description of the metric.</description>
+</action>
+
 <action name="WebView.PermissionAllow.Geolocation">
   <owner>fsamuel@chromium.org</owner>
   <owner>lazyboy@chromium.org</owner>
@@ -10875,6 +10880,11 @@ should be able to be added at any place in this file.
   </description>
 </action>
 
+<action name="WebView.PermissionDeny.FileSystem">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <description>Please enter the description of the metric.</description>
+</action>
+
 <action name="WebView.PermissionDeny.Geolocation">
   <owner>fsamuel@chromium.org</owner>
   <owner>lazyboy@chromium.org</owner>