Change net's predictor_tab_helper to use the new content Navigation API

chrome/browser/net/predictor_tab_helper.h

Index: chrome/browser/net/predictor_tab_helper.h
diff --git a/chrome/browser/net/predictor_tab_helper.h b/chrome/browser/net/predictor_tab_helper.h
index 4d95ba0d2b56d9635856a557fda4c1ae320d74a9..7368308c528815c5ba07d9534d4886302915969c 100644
--- a/chrome/browser/net/predictor_tab_helper.h
+++ b/chrome/browser/net/predictor_tab_helper.h
@@ -11,6 +11,10 @@
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 
+namespace content {
+class NavigationHandle;
+}
+
 namespace chrome_browser_net {
 
 class PredictorTabHelper
@@ -19,10 +23,9 @@ class PredictorTabHelper
  public:
   ~PredictorTabHelper() override;
 
-  // content::WebContentsObserver implementation
-  void DidStartNavigationToPendingEntry(
-      const GURL& url,
-      content::NavigationController::ReloadType reload_type) override;
+  // content::WebContentsObserver:
+  void DidStartNavigation(
+      content::NavigationHandle* navigation_handle) override;
 
  private:
   explicit PredictorTabHelper(content::WebContents* web_contents);