Adds EngineGeolocationFeature for Blimp Geolocation project.

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 e98bc4a96b7f68dcc2de3f34447d09028e5494bd..0f78a9a5c4f56d0126a901993ea80ddce20c0e8b 100644
--- a/blimp/common/create_blimp_message.h
+++ b/blimp/common/create_blimp_message.h
@@ -19,6 +19,7 @@ class BlimpMessage;
 class BlobChannelMessage;
 class CompositorMessage;
 class EngineSettingsMessage;
+class GeolocationMessage;
 class ImeMessage;
 class InputMessage;
 class NavigationMessage;
@@ -70,6 +71,9 @@ BLIMP_COMMON_EXPORT std::unique_ptr<BlimpMessage> CreateBlimpMessage(
 BLIMP_COMMON_EXPORT std::unique_ptr<BlimpMessage> CreateBlimpMessage(
     BlobChannelMessage** blob_channel_message);
 
+BLIMP_COMMON_EXPORT std::unique_ptr<BlimpMessage> CreateBlimpMessage(
+    GeolocationMessage** geolocation_message);
+
 BLIMP_COMMON_EXPORT std::unique_ptr<BlimpMessage> CreateStartConnectionMessage(
     const std::string& client_token,
     int protocol_version);