Only track http and https in duplicate resource handler metrics

content/browser/renderer_host/duplicate_content_resource_handler.h

Index: content/browser/renderer_host/duplicate_content_resource_handler.h
diff --git a/content/browser/renderer_host/duplicate_content_resource_handler.h b/content/browser/renderer_host/duplicate_content_resource_handler.h
index 8ca80e4b2ceb8d35d598a093c6d70bdc5fea675f..ac30dfc335db0e070a6a135a1beaca8c8aba2f46 100644
--- a/content/browser/renderer_host/duplicate_content_resource_handler.h
+++ b/content/browser/renderer_host/duplicate_content_resource_handler.h
@@ -56,6 +56,10 @@ class DuplicateContentResourceHandler: public LayeredResourceHandler {
   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);
 };