Moving pixel-capturing code from web_test_proxy_base.* into pixel_dump.*

components/test_runner/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
 }
 
@@ skipping 38 matching lines @@
     "mock_web_theme_engine.cc",
     "mock_web_theme_engine.h",
     "mock_web_user_media_client.cc",
     "mock_web_user_media_client.h",
     "mock_webrtc_data_channel_handler.cc",
     "mock_webrtc_data_channel_handler.h",
     "mock_webrtc_dtmf_sender_handler.cc",
     "mock_webrtc_dtmf_sender_handler.h",
     "mock_webrtc_peer_connection_handler.cc",
     "mock_webrtc_peer_connection_handler.h",
+    "pixel_dump.cc",
+    "pixel_dump.h",
     "spell_check_client.cc",
     "spell_check_client.h",
     "test_common.cc",
     "test_common.h",
     "test_interfaces.cc",
     "test_interfaces.h",
     "test_plugin.cc",
     "test_plugin.h",
     "test_preferences.cc",
     "test_preferences.h",
@@ skipping 120 matching lines @@
 
     if (is_mac) {
       libs = [ "AppKit.framework" ]
     }
 
     deps = [
       "//build/config/sanitizers:deps",
     ]
   }
 }