add customized printing setting for headless

headless/lib/headless_content_main_delegate.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 "headless/lib/headless_content_main_delegate.h"
 
 #include <utility>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
@@ skipping 15 matching lines @@
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/gfx/switches.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/ozone/public/ozone_switches.h"
 
 #ifdef HEADLESS_USE_EMBEDDED_RESOURCES
 #include "headless/embedded_resource_pak.h"
 #endif
 
+#if defined(OS_MACOSX)
+#include "base/mac/bundle_locations.h"
+#else
+#include "ui/base/ui_base_paths.h"
+#endif
+
 namespace headless {
 namespace {
 // Keep in sync with content/common/content_constants_internal.h.
 // TODO(skyostil): Add a tracing test for this.
 const int kTraceEventBrowserProcessSortIndex = -6;
 
 HeadlessContentMainDelegate* g_current_headless_content_main_delegate = nullptr;
 
 base::LazyInstance<HeadlessCrashReporterClient>::Leaky g_headless_crash_client =
     LAZY_INSTANCE_INITIALIZER;
@@ skipping 188 matching lines @@
   return g_current_headless_content_main_delegate;
 }
 
 // static
 void HeadlessContentMainDelegate::InitializeResourceBundle() {
   base::FilePath dir_module;
   base::FilePath pak_file;
   bool result = PathService::Get(base::DIR_MODULE, &dir_module);
   DCHECK(result);
 
+  // Override locale pak dir to 'headless_locales'.
+  base::FilePath locale_pak =
+      dir_module.AppendASCII(FILE_PATH_LITERAL("headless_locales"));

[Lei Zhang, 2017/04/20 08:35:58]

AppendASCII and FILE_PATH_LITERAL should never be used together. The former
always wants to take a regular string, and the latter is trying to convert the
regular string into a wide string on Windows.

I think the fact that the trybots are green means they are probably not even
building this file. Which then brings up the question of why does this even have
checks for defined(OS_WIN).

[jzfeng, 2017/04/27 06:56:07]

Done.
Headless chrome is about to be enabled on Windows . It should check for this
file afterwards.

+#if defined(OS_MACOSX)
+  base::mac::SetOverrideFrameworkBundlePath(locale_pak);
+#else
+  PathService::Override(ui::DIR_LOCALES, locale_pak);
+#endif
+
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   const std::string locale = command_line->GetSwitchValueASCII(switches::kLang);
   ui::ResourceBundle::InitSharedInstanceWithLocale(
       locale, nullptr, ui::ResourceBundle::DO_NOT_LOAD_COMMON_RESOURCES);
 
 #ifdef HEADLESS_USE_EMBEDDED_RESOURCES
   ResourceBundle::GetSharedInstance().AddDataPackFromBuffer(
       base::StringPiece(
           reinterpret_cast<const char*>(kHeadlessResourcePak.contents),
           kHeadlessResourcePak.length),
@@ skipping 23 matching lines @@
   return browser_client_.get();
 }
 
 content::ContentRendererClient*
 HeadlessContentMainDelegate::CreateContentRendererClient() {
   renderer_client_ = base::MakeUnique<HeadlessContentRendererClient>();
   return renderer_client_.get();
 }
 
 }  // namespace headless