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
new file mode 100644
index 0000000000000000000000000000000000000000..7c6f5e8a30236b1e2699bf9e2e8835c6a772a051
--- /dev/null
+++ b/chrome/browser/predictors/resource_prefetch_predictor_factory.h
@@ -0,0 +1,38 @@
+// 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_