M59: Clear the PrintContext in WebLocalFrameImpl::Close().

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 256 matching lines @@
   }
   return ToWebPluginContainerImpl(WebNode::PluginContainerFromNode(node));
 }
 
 // Simple class to override some of PrintContext behavior. Some of the methods
 // made virtual so that they can be overridden by ChromePluginPrintContext.
 class ChromePrintContext : public PrintContext {
   WTF_MAKE_NONCOPYABLE(ChromePrintContext);
 
  public:
-  ChromePrintContext(LocalFrame* frame)
+  explicit ChromePrintContext(LocalFrame* frame)
       : PrintContext(frame), printed_page_width_(0) {}
 
   ~ChromePrintContext() override {}
 
   virtual void begin(float width, float height) {
     DCHECK(!printed_page_width_);
     printed_page_width_ = width;
     printed_page_height_ = height;
     PrintContext::begin(printed_page_width_, height);
   }
@@ skipping 260 matching lines @@
 
 void WebLocalFrameImpl::Close() {
   WebLocalFrame::Close();
 
   client_ = nullptr;
 
   if (dev_tools_agent_)
     dev_tools_agent_.Clear();
 
   self_keep_alive_.Clear();
+
+  if (print_context_)
+    PrintEnd();
 }
 
 WebString WebLocalFrameImpl::AssignedName() const {
   return GetFrame()->Tree().GetName();
 }
 
 void WebLocalFrameImpl::SetName(const WebString& name) {
   GetFrame()->Tree().SetName(name);
 }
 
@@ skipping 1999 matching lines @@
 TextCheckerClient& WebLocalFrameImpl::GetTextCheckerClient() const {
   return *text_checker_client_;
 }
 
 void WebLocalFrameImpl::SetTextCheckClient(
     WebTextCheckClient* text_check_client) {
   text_check_client_ = text_check_client;
 }
 
 }  // namespace blink