[DevTools] Use special resizing strategy instead of insets.

tools/gn/secondary/chrome/BUILD.gn

 # Copyright (c) 2013 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("//crypto/ssl/flags.gni")
 import("//tools/grit/grit_rule.gni")
 
 executable("chrome") {
   sources = [
     "app/breakpad_field_trial_win.cc",
@@ skipping 94 matching lines @@
     "browser/devtools/adb/android_usb_socket.cc",
     "browser/devtools/adb/android_usb_socket.h",
     "browser/devtools/adb_client_socket.cc",
     "browser/devtools/adb_client_socket.h",
     "browser/devtools/adb_web_socket.cc",
     "browser/devtools/adb_web_socket.h",
     "browser/devtools/browser_list_tabcontents_provider.cc",
     "browser/devtools/browser_list_tabcontents_provider.h",
     "browser/devtools/devtools_adb_bridge.cc",
     "browser/devtools/devtools_adb_bridge.h",
+    "browser/devtools/devtools_contents_resizing_strategy.cc",
+    "browser/devtools/devtools_contents_resizing_strategy.h",
     "browser/devtools/devtools_embedder_message_dispatcher.cc",
     "browser/devtools/devtools_embedder_message_dispatcher.h",
     "browser/devtools/devtools_file_helper.cc",
     "browser/devtools/devtools_file_helper.h",
     "browser/devtools/devtools_file_system_indexer.cc",
     "browser/devtools/devtools_file_system_indexer.h",
     "browser/devtools/devtools_protocol.cc",
     "browser/devtools/devtools_protocol.h",
     "browser/devtools/devtools_toggle_action.h",
     "browser/devtools/devtools_window.cc",
@@ skipping 174 matching lines @@
 #    ":theme_resources_gen",
 #    #"//ui:ui_resources",
 #  ]
 #}
 #
 ## TODO(brettw) rename "app_theme_resources" or something when we don't support
 ## GYP any more. This name is required to match the GYP build.
 #grit("theme_resources_gen") {
 #  source = "app/theme/theme_resources.grd"
 #}