Introduce chrome.shell.createWindow stub API for app_shell

apps/shell/renderer/shell_extensions_renderer_client.cc

Index: apps/shell/renderer/shell_extensions_renderer_client.cc
diff --git a/apps/shell/renderer/shell_extensions_renderer_client.cc b/apps/shell/renderer/shell_extensions_renderer_client.cc
index c5de265ea13273021d3898f8aea4d37b0c17dea7..039a97070badb03b5229852f86e296417aabdc95 100644
--- a/apps/shell/renderer/shell_extensions_renderer_client.cc
+++ b/apps/shell/renderer/shell_extensions_renderer_client.cc
@@ -4,6 +4,12 @@
 
 #include "apps/shell/renderer/shell_extensions_renderer_client.h"
 
+#include "apps/shell/renderer/shell_custom_bindings.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/renderer/resource_bundle_source_map.h"
+#include "extensions/renderer/module_system.h"
+#include "grit/app_shell_resources.h"
+
 namespace apps {
 
 ShellExtensionsRendererClient::ShellExtensionsRendererClient() {}
@@ -22,4 +28,17 @@ int ShellExtensionsRendererClient::GetLowestIsolatedWorldId() const {
   return 1;
 }
 
+void ShellExtensionsRendererClient::RegisterNativeHandlers(
+    extensions::ModuleSystem* module_system,
+    extensions::ScriptContext* context) {
+  module_system->RegisterNativeHandler(
+      "shell_natives",
+      scoped_ptr<extensions::NativeHandler>(new ShellCustomBindings(context)));
+}
+
+void ShellExtensionsRendererClient::PopulateSourceMap(
+    ResourceBundleSourceMap* source_map) {
+  source_map->RegisterSource("shell", IDR_SHELL_CUSTOM_BINDINGS_JS);
+}
+
 }  // namespace apps