[Blimp Net] Add EngineAuthHandler.

blimp/common/create_blimp_message.h

Index: blimp/common/create_blimp_message.h
diff --git a/blimp/common/create_blimp_message.h b/blimp/common/create_blimp_message.h
index 1e638d550244ddcb4c48957526c2f3b97c2c6417..9ffa2b15f412439607ec2b20be5e8cbbb07bbbaf 100644
--- a/blimp/common/create_blimp_message.h
+++ b/blimp/common/create_blimp_message.h
@@ -5,6 +5,8 @@
 #ifndef BLIMP_COMMON_CREATE_BLIMP_MESSAGE_H_
 #define BLIMP_COMMON_CREATE_BLIMP_MESSAGE_H_
 
+#include <string>
+
 #include "base/memory/scoped_ptr.h"
 #include "blimp/common/blimp_common_export.h"
 
@@ -14,6 +16,7 @@ class BlimpMessage;
 class CompositorMessage;
 class InputMessage;
 class RenderWidgetMessage;
+class StartConnectionMessage;
 
 // Suite of helper methods to simplify the repetitive task of creating
 // new BlimpMessages, initializing them, and extracting type-specific
@@ -38,6 +41,10 @@ BLIMP_COMMON_EXPORT scoped_ptr<BlimpMessage> CreateBlimpMessage(
     RenderWidgetMessage** render_widget_message,
     int target_tab_id);
 
+BLIMP_COMMON_EXPORT scoped_ptr<BlimpMessage> CreateStartConnectionMessage(
+    const std::string& client_token,
+    int protocol_version);
+
 }  // namespace blimp
 
 #endif  // BLIMP_COMMON_CREATE_BLIMP_MESSAGE_H_