Refactor net predictor to use ResourceThrottles

chrome/browser/profiles/profile_io_data.h

Index: chrome/browser/profiles/profile_io_data.h
diff --git a/chrome/browser/profiles/profile_io_data.h b/chrome/browser/profiles/profile_io_data.h
index 008efe2b62c8e18b3f7428b8f4234656008b1c57..544e70199dd4017d1879c717ac84e06729f157d8 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -244,6 +244,10 @@ class ProfileIOData {
     return data_reduction_proxy_io_data_.get();
   }
 
+  // Returns the predictor service for this Profile. Returns nullptr if there is
+  // no Predictor, as is the case with OffTheRecord profiles.
+  virtual chrome_browser_net::Predictor* GetPredictor();
+
  protected:
   // A URLRequestContext for media that owns its HTTP factory, to ensure
   // it is deleted.