Enable building headless_shell in MAC. This is an initial implementation with a hidden window, rath…

headless/lib/browser/headless_content_browser_client.h

 // 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.
 
 #ifndef HEADLESS_LIB_BROWSER_HEADLESS_CONTENT_BROWSER_CLIENT_H_
 #define HEADLESS_LIB_BROWSER_HEADLESS_CONTENT_BROWSER_CLIENT_H_
 
 #include "content/public/browser/content_browser_client.h"
 
 namespace headless {
@@ skipping 10 matching lines @@
       const content::MainFunctionParams&) override;
   void OverrideWebkitPrefs(content::RenderViewHost* render_view_host,
                            content::WebPreferences* prefs) override;
   content::DevToolsManagerDelegate* GetDevToolsManagerDelegate() override;
   std::unique_ptr<base::Value> GetServiceManifestOverlay(
       base::StringPiece name) override;
   void GetQuotaSettings(
       content::BrowserContext* context,
       content::StoragePartition* partition,
       const storage::OptionalQuotaSettingsCallback& callback) override;
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
   void GetAdditionalMappedFilesForChildProcess(
       const base::CommandLine& command_line,
       int child_process_id,
       content::FileDescriptorInfo* mappings) override;
+#endif
   void AppendExtraCommandLineSwitches(base::CommandLine* command_line,
                                       int child_process_id) override;
 
  private:
   HeadlessBrowserImpl* browser_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(HeadlessContentBrowserClient);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_LIB_BROWSER_HEADLESS_CONTENT_BROWSER_CLIENT_H_