Only track http and https in duplicate resource handler metrics

content/browser/renderer_host/duplicate_content_resource_handler.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.
 
 // DuplicateContentResourceHandler keeps a hash of resources seen and based on
 // url. It is an experiment meant to simulate cache hits for both a url-based
 // and a content-based cache.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_DUPLICATE_CONTENT_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_DUPLICATE_CONTENT_RESOURCE_HANDLER_H_
@@ skipping 38 matching lines @@
   ResourceType::Type resource_type_;
   int bytes_read_;
   scoped_refptr<net::IOBuffer> read_buffer_;
   net::URLRequest* request_;
 
   // These values are temporary values that are used in each digest of the
   // inputs for the incremental hash (PMurHash).
   MH_UINT32 pmurhash_ph1_;
   MH_UINT32 pmurhash_pcarry_;
 
+  // Used to track if it's a request we're interested in. If it's not, then we
+  // early out to avoid calculating the hash unnecessarily.
+  bool track_request_;
+
   DISALLOW_COPY_AND_ASSIGN(DuplicateContentResourceHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_DUPLICATE_CONTENT_RESOURCE_HANDLER_H_