Mojo: Add BindingsSupportImpl on top of HandleWatcher

mojo/shell/context.h

Index: mojo/shell/context.h
diff --git a/mojo/shell/context.h b/mojo/shell/context.h
index f2dec1269736fbba5a1555db4c01d5fff2cf3c4b..16c04b444f27f54e8c966a008815d37e2cb8f708 100644
--- a/mojo/shell/context.h
+++ b/mojo/shell/context.h
@@ -5,6 +5,7 @@
 #ifndef MOJO_SHELL_CONTEXT_H_
 #define MOJO_SHELL_CONTEXT_H_
 
+#include "mojo/common/bindings_support_impl.h"
 #include "mojo/shell/loader.h"
 #include "mojo/shell/storage.h"
 #include "mojo/shell/task_runners.h"
@@ -34,6 +35,7 @@ class Context {
   TaskRunners task_runners_;
   Storage storage_;
   Loader loader_;
+  common::BindingsSupportImpl bindings_support_impl_;
 
 #if defined(OS_ANDROID)
   base::android::ScopedJavaGlobalRef<jobject> activity_;