Convert tests to use the non-deprecated WebContentsObserver navigation methods.

chrome/browser/ui/browser_instant_controller_unittest.cc

Index: chrome/browser/ui/browser_instant_controller_unittest.cc
diff --git a/chrome/browser/ui/browser_instant_controller_unittest.cc b/chrome/browser/ui/browser_instant_controller_unittest.cc
index 79be65ec5c90d1afba3741f793685303fb862cbf..723b099fb40d1df35d27faae835dde4ec74e7386 100644
--- a/chrome/browser/ui/browser_instant_controller_unittest.cc
+++ b/chrome/browser/ui/browser_instant_controller_unittest.cc
@@ -16,10 +16,12 @@
 #include "chrome/browser/ui/browser_instant_controller.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/url_constants.h"
+#include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/reload_type.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "content/public/common/browser_side_navigation_policy.h"
 
 namespace chrome {
 
@@ -79,12 +81,24 @@ class FakeWebContentsObserver : public content::WebContentsObserver {
         url_(contents->GetURL()),
         num_reloads_(0) {}
 
-  void DidStartNavigationToPendingEntry(
-      const GURL& url,
-      content::ReloadType reload_type) override {
-    if (url_ == url)
+  void DidStartNavigation(
+      content::NavigationHandle* navigation_handle) override {
+    if (!content::IsBrowserSideNavigationEnabled())
+      return;
+    if (url_ == navigation_handle->GetURL())
       num_reloads_++;
-    current_url_ = url;
+    current_url_ = navigation_handle->GetURL();
+  }
+
+  // TODO: remove this method when PlzNavigate is turned on by default.
+  void DidStartNavigationToPendingEntry(
+      const GURL& url,
+      content::ReloadType reload_type) override {
+    if (content::IsBrowserSideNavigationEnabled())
+      return;
+    if (url_ == url)
+      num_reloads_++;
+    current_url_ = url;
   }
 
   const GURL& url() const { return url_; }