Remove client relationship between sky::Inspector{Front,Back}end

mojo/common/weak_binding_set.h

Index: mojo/common/weak_binding_set.h
diff --git a/mojo/common/weak_binding_set.h b/mojo/common/weak_binding_set.h
index 7978285596be48f12df48a52e28d36a46e78fe67..e7e164b2cee1857f68ea362035acc2add6d8ac35 100644
--- a/mojo/common/weak_binding_set.h
+++ b/mojo/common/weak_binding_set.h
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifndef MOJO_COMMON_WEAK_BINDING_SET_H_
+#define MOJO_COMMON_WEAK_BINDING_SET_H_
+
 #include <algorithm>
 #include <vector>
 
@@ -88,3 +91,5 @@ class WeakBinding : public ErrorHandler {
 };
 
 }  // namespace mojo
+
+#endif  // MOJO_COMMON_WEAK_BINDING_SET_H_