Fix two harmless int-to-pointer conversions that a new clang warns about.

content/browser/renderer_host/test_render_view_host.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/test_backing_store.h"
 #include "content/browser/renderer_host/test_render_view_host.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/browser/web_contents/navigation_controller_impl.h"
 #include "content/browser/web_contents/test_web_contents.h"
 #include "content/common/view_messages.h"
@@ skipping 217 matching lines @@
     SiteInstance* instance,
     RenderViewHostDelegate* delegate,
     RenderWidgetHostDelegate* widget_delegate,
     int routing_id,
     bool swapped_out)
     : RenderViewHostImpl(instance,
                          delegate,
                          widget_delegate,
                          routing_id,
                          swapped_out,
-                         dom_storage::kInvalidSessionStorageNamespaceId),
+                         NULL),
       render_view_created_(false),
       delete_counter_(NULL),
       simulate_fetch_via_proxy_(false),
       contents_mime_type_("text/html") {
   // For normal RenderViewHosts, this is freed when |Shutdown()| is
   // called.  For TestRenderViewHost, the view is explicitly
   // deleted in the destructor below, because
   // TestRenderWidgetHostView::Destroy() doesn't |delete this|.
   SetView(new TestRenderWidgetHostView(this));
 }
@@ skipping 115 matching lines @@
 
 TestRenderViewHost* RenderViewHostImplTestHarness::active_test_rvh() {
   return static_cast<TestRenderViewHost*>(active_rvh());
 }
 
 TestWebContents* RenderViewHostImplTestHarness::contents() {
   return static_cast<TestWebContents*>(web_contents());
 }
 
 }  // namespace content