Add glue between the client and engine for Blimp

blimp/common/proto/resize.proto

Index: blimp/common/proto/resize.proto
diff --git a/blimp/common/proto/common.proto b/blimp/common/proto/resize.proto
similarity index 57%
copy from blimp/common/proto/common.proto
copy to blimp/common/proto/resize.proto
index 578c02b63b78d3b0e09bedfc4582d517d2c263cb..dd1c3dffaeaff028fac55f7f713421b2b23159a1 100644
--- a/blimp/common/proto/common.proto
+++ b/blimp/common/proto/resize.proto
@@ -1,8 +1,6 @@
 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Common message types for sharing across Blimp subprotocols.
 
 syntax = "proto2";
 
@@ -10,8 +8,10 @@ option optimize_for = LITE_RUNTIME;
 
 package blimp;
 
-message CoordinatePair {
-  optional sint32 x = 1;
-  optional sint32 y = 2;
+// Contains display information that represents resize events coming from the
+// client device.
+message ResizeMessage {
+  optional uint64 width = 1;
+  optional uint64 height = 2;
 }