M57: Properly clean up in PrintViewManager::RenderFrameCreated().

chrome/browser/printing/print_view_manager.cc

Index: chrome/browser/printing/print_view_manager.cc
diff --git a/chrome/browser/printing/print_view_manager.cc b/chrome/browser/printing/print_view_manager.cc
index ea49f9b888e4f33ba9966739c1c0e1585eada2b8..bfce3a7c57f38c9aa5ec1f2a6bd6f3c974f99d3c 100644
--- a/chrome/browser/printing/print_view_manager.cc
+++ b/chrome/browser/printing/print_view_manager.cc
@@ -135,7 +135,8 @@ void PrintViewManager::PrintPreviewForWebNode(content::RenderFrameHost* rfh) {
 
 void PrintViewManager::PrintPreviewDone() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  DCHECK_NE(NOT_PREVIEWING, print_preview_state_);
+  if (print_preview_state_ == NOT_PREVIEWING)
+    return;
 
   if (print_preview_state_ == SCRIPTED_PREVIEW) {
     auto& map = g_scripted_print_preview_closure_map.Get();
@@ -160,7 +161,7 @@ void PrintViewManager::RenderFrameCreated(
 void PrintViewManager::RenderFrameDeleted(
     content::RenderFrameHost* render_frame_host) {
   if (render_frame_host == print_preview_rfh_)
-    print_preview_state_ = NOT_PREVIEWING;
+    PrintPreviewDone();
   PrintViewManagerBase::RenderFrameDeleted(render_frame_host);
 }