Fix print preview close in gmail.

chrome/browser/printing/print_preview_dialog_controller.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/printing/print_preview_dialog_controller.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 329 matching lines @@
           ui::PageTransitionCoreTypeIs(transition_type,
                                        ui::PAGE_TRANSITION_RELOAD) &&
           nav_type == content::NAVIGATION_TYPE_EXISTING_PAGE &&
           IsPrintPreviewURL(details->previous_url)) {
         return;
       }
     }
     NOTREACHED();
     return;
   }
+  if (details) {
+    ui::PageTransition type = details->entry->GetTransitionType();
+    content::NavigationType nav_type = details->type;
+    if (nav_type == content::NAVIGATION_TYPE_EXISTING_PAGE &&
+        (ui::PageTransitionCoreTypeIs(type, ui::PAGE_TRANSITION_TYPED) ||
+         ui::PageTransitionCoreTypeIs(type, ui::PAGE_TRANSITION_LINK)))
+      return;
+  }
 
   RemoveInitiator(contents);
 }
 
 WebContents* PrintPreviewDialogController::CreatePrintPreviewDialog(
     WebContents* initiator) {
   base::AutoReset<bool> auto_reset(&is_creating_print_preview_dialog_, true);
 
   // The dialog delegates are deleted when the dialog is closed.
   ConstrainedWebDialogDelegate* web_dialog_delegate =
@@ skipping 99 matching lines @@
   if (initiator) {
     RemoveObservers(initiator);
     PrintViewManager::FromWebContents(initiator)->PrintPreviewDone();
   }
 
   preview_dialog_map_.erase(preview_dialog);
   RemoveObservers(preview_dialog);
 }
 
 }  // namespace printing