Create LoadingDataCollector class and have observers rely on it instead of ResourcePrefetchPredictor

chrome/browser/predictors/resource_prefetch_predictor.h

Index: chrome/browser/predictors/resource_prefetch_predictor.h
diff --git a/chrome/browser/predictors/resource_prefetch_predictor.h b/chrome/browser/predictors/resource_prefetch_predictor.h
index 2cd3c950895ace6aabeb4aa0cf8d2067fa9263e0..327482d9bc918b13ccaea2ee4708a5d1618a1867 100644
--- a/chrome/browser/predictors/resource_prefetch_predictor.h
+++ b/chrome/browser/predictors/resource_prefetch_predictor.h
@@ -204,12 +204,6 @@ class ResourcePrefetchPredictor
   void StartInitialization();
   void Shutdown();
 
-  // Thread safe.
-  static bool ShouldRecordRequest(net::URLRequest* request,
-                                  content::ResourceType resource_type);
-  static bool ShouldRecordResponse(net::URLRequest* response);
-  static bool ShouldRecordRedirect(net::URLRequest* response);
-
   // Determines the resource type from the declared one, falling back to MIME
   // type detection when it is not explicit.
   static content::ResourceType GetResourceType(
@@ -323,22 +317,9 @@ class ResourcePrefetchPredictor
   typedef std::map<NavigationID, std::unique_ptr<PageRequestSummary>>
       NavigationMap;
 
-  // Returns true if the main page request is supported for prediction.
-  static bool IsHandledMainPage(net::URLRequest* request);
-
-  // Returns true if the subresource request is supported for prediction.
-  static bool IsHandledSubresource(net::URLRequest* request,
-                                   content::ResourceType resource_type);
-
-  // Returns true if the subresource has a supported type.
-  static bool IsHandledResourceType(content::ResourceType resource_type,
-                                    const std::string& mime_type);
-
   // Returns true if the request (should have a response in it) is "no-store".
   static bool IsNoStore(const net::URLRequest& request);
 
-  static void SetAllowPortInUrlsForTesting(bool state);
-
   // Functions called on different network events pertaining to the loading of
   // main frame resource or sub resources.
   void OnMainFrameRequest(const URLRequestSummary& request);