Don't do Instant previews of chrome://crash

chrome/browser/instant/instant_controller.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 180 matching lines @@
   virtual void SwappedTabContents(InstantLoader* loader) OVERRIDE;
 
  private:
   friend class InstantTest;
 
   enum PreviewCondition {
     PREVIEW_CONDITION_SUCCESS,
     PREVIEW_CONDITION_INVALID_TEMPLATE_URL,
     PREVIEW_CONDITION_JAVASCRIPT_SCHEME,
     PREVIEW_CONDITION_EXTENSION_KEYWORD,
-    PREVIEW_CONDITION_BLACKLISTED,
+    PREVIEW_CONDITION_BLACKLISTED_HOST,
+    PREVIEW_CONDITION_BLACKLISTED_URL,
     PREVIEW_CONDITION_INSTANT_SEARCH_ONLY,
   };
 
   typedef std::set<std::string> HostBlacklist;
 
   // Updates |displayable_loader_| and if necessary notifies the delegate.
   void UpdateDisplayableLoader();
 
   // Returns the TabContents of the pending loader (or NULL). This is only used
   // for testing.
@@ skipping 95 matching lines @@
   ScopedVector<InstantLoader> loaders_to_destroy_;
 
   // The set of hosts that we don't use instant with. This is shared across all
   // instances and only maintained for the current session.
   static HostBlacklist* host_blacklist_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_