Show interstitial from ManagedModeNavigationObserver instead of ManagedModeResourceThrottle.

chrome/browser/managed_mode/managed_mode_interstitial.h

Index: chrome/browser/managed_mode/managed_mode_interstitial.h
diff --git a/chrome/browser/managed_mode/managed_mode_interstitial.h b/chrome/browser/managed_mode/managed_mode_interstitial.h
index 98aeaef65307d03bed169989f7e73b92eead8307..1bfc346d1fb07d7f70b0322070decb57347002c9 100644
--- a/chrome/browser/managed_mode/managed_mode_interstitial.h
+++ b/chrome/browser/managed_mode/managed_mode_interstitial.h
@@ -28,16 +28,6 @@ class ManagedModeInterstitial : public content::InterstitialPageDelegate {
                           const base::Callback<void(bool)>& callback);
   virtual ~ManagedModeInterstitial();
 
-  // Should be called on the IO thread.
-  // |render_process_host_id| and |render_view_id| identify the WebContents
-  // where the request was blocked. |url| is the URL that was blocked.
-  // |callback| should be called with the result (whether to allow the request
-  // or not).
-  static void ShowInterstitial(int render_process_host_id,
-                               int render_view_id,
-                               const GURL& url,
-                               const base::Callback<void(bool)>& callback);
-
  private:
   void GoToNewTabPage();
 
@@ -50,7 +40,6 @@ class ManagedModeInterstitial : public content::InterstitialPageDelegate {
   // Will be called when the passphrase dialog is closed, which is shown after
   // clicking the preview button.
   void OnAuthorizationResult(bool success);
-  void DispatchContinueRequest(bool continue_request);
 
   // Owns the interstitial, which owns us.
   content::WebContents* web_contents_;