Pass data saver pref value into embedded worker

chrome/browser/chrome_content_browser_client.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 #define CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "build/build_config.h"
 #include "content/public/browser/content_browser_client.h"
 
 class ChromeContentBrowserClientParts;
 
 namespace base {
 class CommandLine;
 }
 
 namespace content {
+class BrowserContext;
 class QuotaPermissionContext;
 }
 
 namespace extensions {
 class BrowserPermissionsPolicyDelegate;
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
@@ skipping 81 matching lines @@
       const GURL& current_url,
       const GURL& new_url) override;
   bool ShouldAssignSiteForURL(const GURL& url) override;
   std::string GetCanonicalEncodingNameByAliasName(
       const std::string& alias_name) override;
   void AppendExtraCommandLineSwitches(base::CommandLine* command_line,
                                       int child_process_id) override;
   std::string GetApplicationLocale() override;
   std::string GetAcceptLangs(content::BrowserContext* context) override;
   const gfx::ImageSkia* GetDefaultFavicon() override;
+  bool IsDataSaverEnabled(content::BrowserContext* context) override;
   bool AllowAppCache(const GURL& manifest_url,
                      const GURL& first_party,
                      content::ResourceContext* context) override;
   bool AllowServiceWorker(const GURL& scope,
                           const GURL& first_party,
                           content::ResourceContext* context,
                           int render_process_id,
                           int render_frame_id) override;
   bool AllowGetCookie(const GURL& url,
                       const GURL& first_party,
@@ skipping 212 matching lines @@
   // Vector of additional ChromeContentBrowserClientParts.
   // Parts are deleted in the reverse order they are added.
   std::vector<ChromeContentBrowserClientParts*> extra_parts_;
 
   base::WeakPtrFactory<ChromeContentBrowserClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentBrowserClient);
 };
 
 #endif  // CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_