Implement a salt for MediaSource IDs that can be cleared by a user.

content/browser/loader/resource_scheduler_unittest.cc

 // 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.
 
 #include "content/browser/loader/resource_scheduler.h"
 
 #include "base/memory/scoped_vector.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/browser_thread_impl.h"
@@ skipping 74 matching lines @@
 
   scoped_ptr<TestRequest> request_to_cancel_;
 };
 
 class FakeResourceContext : public ResourceContext {
  private:
   virtual net::HostResolver* GetHostResolver() OVERRIDE { return NULL; }
   virtual net::URLRequestContext* GetRequestContext() OVERRIDE { return NULL; }
   virtual bool AllowMicAccess(const GURL& origin) OVERRIDE { return false; }
   virtual bool AllowCameraAccess(const GURL& origin) OVERRIDE { return false; }
+  virtual std::string GetMediaDeviceIDSalt() OVERRIDE { return std::string(); }
 };
 
 class FakeResourceMessageFilter : public ResourceMessageFilter {
  public:
   FakeResourceMessageFilter(int child_id)
       : ResourceMessageFilter(
           child_id,
           PROCESS_TYPE_RENDERER,
           NULL  /* appcache_service */,
           NULL  /* blob_storage_context */,
@@ skipping 354 matching lines @@
   scoped_ptr<TestRequest> low(NewRequest("http://host/high", net::LOWEST));
 
   scoped_ptr<TestRequest> request(
       NewRequest("chrome-extension://req", net::LOWEST));
   EXPECT_TRUE(request->started());
 }
 
 }  // unnamed namespace
 
 }  // namespace content