*DRAFT* Move MediaDeviceIDSalt from chrome/ to components/ and use it in Android WebView.

android_webview/browser/aw_resource_context.cc

 // Copyright 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.
 
 #include "android_webview/browser/aw_resource_context.h"
-
+#include "components/media_device_id_salt/media_device_id_salt.h"
+#include "components/prefs/pref_service.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
 
 using content::BrowserThread;
+using media_device_id_salt::MediaDeviceIDSalt;
 
 namespace android_webview {
 
-AwResourceContext::AwResourceContext(net::URLRequestContextGetter* getter)
-    : getter_(getter) {
+AwResourceContext::AwResourceContext(net::URLRequestContextGetter* getter,
+                                     PrefService* pref_service,
+                                     bool incognito)
+    : getter_(getter),
+      media_device_id_salt_(new MediaDeviceIDSalt(pref_service, incognito)) {
   DCHECK(getter_);
 }
 
 AwResourceContext::~AwResourceContext() {
 }
 
 void AwResourceContext::SetExtraHeaders(
     const GURL& url, const std::string& headers) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   if (!url.is_valid()) return;
@@ skipping 16 matching lines @@
 net::HostResolver* AwResourceContext::GetHostResolver() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   return getter_->GetURLRequestContext()->host_resolver();
 }
 
 net::URLRequestContext* AwResourceContext::GetRequestContext() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   return getter_->GetURLRequestContext();
 }
 
+content::ResourceContext::SaltCallback
+AwResourceContext::GetMediaDeviceIDSalt() {
+  return base::Bind(&MediaDeviceIDSalt::GetSalt, media_device_id_salt_);
+}
+
 }  // namespace android_webview