Make isolated file system works for a device root (e.g. X:\\)

content/renderer/web_intents_host.cc

Index: content/renderer/web_intents_host.cc
diff --git a/content/renderer/web_intents_host.cc b/content/renderer/web_intents_host.cc
index 80d47bd56252be9b33ec7e356967316a6b444654..feff144d54cb3b9d7e697fbb36ec5753ae946105 100644
--- a/content/renderer/web_intents_host.cc
+++ b/content/renderer/web_intents_host.cc
@@ -25,6 +25,7 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
 #include "v8/include/v8.h"
 #include "webkit/fileapi/file_system_util.h"
+#include "webkit/fileapi/isolated_context.h"
 #include "webkit/glue/cpp_bound_class.h"
 
 using WebKit::WebBindings;
@@ -180,7 +181,7 @@ void WebIntentsHost::DidClearWindowObject(WebFrame* frame) {
         "%s%s/%s/",
         root_url.spec().c_str(),
         intent_->filesystem_id.c_str(),
-        intent_->root_path.BaseName().AsUTF8Unsafe().c_str());
+        intent_->root_name.c_str());
     // TODO(kmadhusu): This is a temporary hack to create a serializable file
     // system. Once we have a better way to create a serializable file system,
     // remove this hack.