Cleanup blimp/client/core code organization.

blimp/client/core/context/dummy_blimp_client_context.h

Index: blimp/client/core/context/dummy_blimp_client_context.h
diff --git a/blimp/client/core/dummy_blimp_client_context.h b/blimp/client/core/context/dummy_blimp_client_context.h
similarity index 86%
rename from blimp/client/core/dummy_blimp_client_context.h
rename to blimp/client/core/context/dummy_blimp_client_context.h
index ae59d31460ab9feea04e08e93509c693907a08ce..aa56ad2e2ded7d7ea4551c38299411366155f903 100644
--- a/blimp/client/core/dummy_blimp_client_context.h
+++ b/blimp/client/core/context/dummy_blimp_client_context.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef BLIMP_CLIENT_CORE_DUMMY_BLIMP_CLIENT_CONTEXT_H_
-#define BLIMP_CLIENT_CORE_DUMMY_BLIMP_CLIENT_CONTEXT_H_
+#ifndef BLIMP_CLIENT_CORE_CONTEXT_DUMMY_BLIMP_CLIENT_CONTEXT_H_
+#define BLIMP_CLIENT_CORE_CONTEXT_DUMMY_BLIMP_CLIENT_CONTEXT_H_
 
 #include "base/macros.h"
 #include "blimp/client/public/blimp_client_context.h"
@@ -35,4 +35,4 @@ class DummyBlimpClientContext : public BlimpClientContext {
 }  // namespace client
 }  // namespace blimp
 
-#endif  // BLIMP_CLIENT_CORE_DUMMY_BLIMP_CLIENT_CONTEXT_H_
+#endif  // BLIMP_CLIENT_CORE_CONTEXT_DUMMY_BLIMP_CLIENT_CONTEXT_H_