GN: Refactor so that WebRTC compiles with rtc_enable_protobuf=false.

webrtc/tools/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//third_party/protobuf/proto_library.gni")
 import("../build/webrtc.gni")
@@ skipping 12 matching lines @@
   if (rtc_include_internal_audio_device) {
     public_deps += [ ":force_mic_volume_max" ]
   }
   if (rtc_enable_protobuf) {
     public_deps += [ ":chart_proto" ]
   }
 
   if (rtc_include_tests) {
     public_deps += [
       ":activity_metric",
-      ":rtp_analyzer",
       ":tools_unittests",
     ]
     if (rtc_enable_protobuf) {
-      public_deps += [ ":event_log_visualizer" ]
+      public_deps += [
+        ":event_log_visualizer",
+        ":rtp_analyzer",
+      ]
     }
   }
 }
 
 rtc_static_library("command_line_parser") {
   sources = [
     "simple_command_line_parser.cc",
     "simple_command_line_parser.h",
   ]
   deps = [
@@ skipping 273 matching lines @@
       ]
       outputs = [
         "$root_build_dir/{{source_file_part}}",
       ]
       deps = [
         "../logging:rtc_event_log_proto",
       ]
     }
   }
 }