Use Chromium BUILD to approximate Blimp protocol version, and check it.

blimp/client/app/android/blimp_client_session_android.cc

 // 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.
 
 #include "blimp/client/app/android/blimp_client_session_android.h"
 
 #include <string>
 
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "blimp/client/app/user_agent.h"
 #include "blimp/client/feature/settings_feature.h"
 #include "blimp/client/feature/tab_control_feature.h"
 #include "blimp/client/session/assignment_source.h"
-#include "blimp/common/protocol_version.h"
+#include "components/version_info/version_info.h"
 #include "jni/BlimpClientSession_jni.h"
 #include "net/base/net_errors.h"
 
 namespace blimp {
 namespace client {
 namespace {
 const int kDummyTabId = 0;
 
 GURL CreateAssignerGURL(const std::string& assigner_url) {
   GURL parsed_url(assigner_url);
@@ skipping 75 matching lines @@
 void BlimpClientSessionAndroid::OnAssignmentConnectionAttempted(
     AssignmentSource::Result result,
     const Assignment& assignment) {
   // Notify the front end of the assignment result.
   std::string engine_ip = IPAddressToStringWithPort(
       assignment.engine_endpoint.address(), assignment.engine_endpoint.port());
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_BlimpClientSession_onAssignmentReceived(
       env, java_obj_.obj(), static_cast<jint>(result),
       base::android::ConvertUTF8ToJavaString(env, engine_ip).obj(),
-      base::android::ConvertUTF8ToJavaString(env, blimp::kEngineVersion).obj());
+      base::android::ConvertUTF8ToJavaString(env,
+                                             version_info::GetVersionNumber())
+          .obj());
 
   BlimpClientSession::OnAssignmentConnectionAttempted(result, assignment);
 }
 
 base::android::ScopedJavaLocalRef<jintArray>
 BlimpClientSessionAndroid::GetDebugInfo(
     JNIEnv* env,
     const base::android::JavaParamRef<jobject>& jobj) {
   BlimpConnectionStatistics* stats =
       BlimpClientSession::GetBlimpConnectionStatistics();
   int metrics[] = {stats->Get(BlimpConnectionStatistics::BYTES_RECEIVED),
                    stats->Get(BlimpConnectionStatistics::BYTES_SENT),
                    stats->Get(BlimpConnectionStatistics::COMMIT)};
   return base::android::ToJavaIntArray(env, metrics, arraysize(metrics));
 }
 
 }  // namespace client
 }  // namespace blimp