Revert of Revert CL 117933003. Re-add resource speculative prefetching code.

chrome/browser/predictors/resource_prefetch_predictor_factory.h

Index: chrome/browser/predictors/resource_prefetch_predictor_factory.h
diff --git a/chrome/browser/predictors/resource_prefetch_predictor_factory.h b/chrome/browser/predictors/resource_prefetch_predictor_factory.h
deleted file mode 100644
index 7c6f5e8a30236b1e2699bf9e2e8835c6a772a051..0000000000000000000000000000000000000000
--- a/chrome/browser/predictors/resource_prefetch_predictor_factory.h
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright 2014 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_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_FACTORY_H_
-#define CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_FACTORY_H_
-
-#include "base/basictypes.h"
-#include "base/memory/singleton.h"
-#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
-
-namespace predictors {
-
-class ResourcePrefetchPredictor;
-
-class ResourcePrefetchPredictorFactory
-    : public BrowserContextKeyedServiceFactory {
- public:
-  static ResourcePrefetchPredictor* GetForProfile(
-      content::BrowserContext* context);
-  static ResourcePrefetchPredictorFactory* GetInstance();
-
- private:
-  friend struct DefaultSingletonTraits<ResourcePrefetchPredictorFactory>;
-
-  ResourcePrefetchPredictorFactory();
-  virtual ~ResourcePrefetchPredictorFactory();
-
-  // RefcountedBrowserContextKeyedServiceFactory:
-  virtual KeyedService* BuildServiceInstanceFor(
-      content::BrowserContext* context) const OVERRIDE;
-
-  DISALLOW_COPY_AND_ASSIGN(ResourcePrefetchPredictorFactory);
-};
-
-}  // namespace predictors
-
-#endif  // CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_FACTORY_H_