Fixed print_web_view_helper for CEF.

chrome/renderer/printing/print_web_view_helper.h

 // 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.
 
 #ifndef CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 51 matching lines @@
 // PrintWebViewHelper handles most of the printing grunt work for RenderView.
 // We plan on making print asynchronous and that will require copying the DOM
 // of the document and creating a new WebView with the contents.
 class PrintWebViewHelper
     : public content::RenderViewObserver,
       public content::RenderViewObserverTracker<PrintWebViewHelper> {
  public:
   explicit PrintWebViewHelper(content::RenderView* render_view);
   virtual ~PrintWebViewHelper();
 
+  // Disable print preview and switch to system dialog printing even if full
+  // printing is build-in. This method is used by CEF.
+  static void DisablePreview();
+
   bool IsPrintingEnabled();
 
   void PrintNode(const blink::WebNode& node);
 
  private:
   friend class PrintWebViewHelperTestBase;
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperPreviewTest,
                            BlockScriptInitiatedPrinting);
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, OnPrintPages);
-
+  FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, OnPrintPages);
+  FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest,
+                           BlockScriptInitiatedPrinting);
+  FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest,
+                           BlockScriptInitiatedPrintingFromPopup);
 #if defined(OS_WIN) || defined(OS_MACOSX)
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, PrintLayoutTest);
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, PrintWithIframe);
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 
   enum PrintingResult {
     OK,
     FAIL_PRINT_INIT,
     FAIL_PRINT,
     FAIL_PREVIEW,
@@ skipping 210 matching lines @@
 
   void SetPrintPagesParams(const PrintMsg_PrintPages_Params& settings);
 
   // WebView used only to print the selection.
   scoped_ptr<PrepareFrameAndViewForPrint> prep_frame_view_;
   bool reset_prep_frame_view_;
 
   scoped_ptr<PrintMsg_PrintPages_Params> print_pages_params_;
   bool is_print_ready_metafile_sent_;
   bool ignore_css_margins_;
+
   // Used for scripted initiated printing blocking.
   bool is_scripted_printing_blocked_;
 
   // Let the browser process know of a printing failure. Only set to false when
   // the failure came from the browser in the first place.
   bool notify_browser_of_print_failure_;
 
   // True, when printing from print preview.
   bool print_for_preview_;
 
@@ skipping 99 matching lines @@
     int print_ready_metafile_page_count_;
 
     base::TimeDelta document_render_time_;
     base::TimeTicks begin_time_;
 
     enum PrintPreviewErrorBuckets error_;
 
     State state_;
   };
 
+  class ScriptingThrottler {
+   public:
+    ScriptingThrottler();
+
+    // Returns false if script initiated printing occurs too often.
+    bool IsAllowed(blink::WebFrame* frame);
+
+    // Reset the counter for script initiated printing.
+    // Scripted printing will be allowed to continue.
+    void Reset();
+
+   private:
+    base::Time last_print_;
+    int count_ = 0;
+    DISALLOW_COPY_AND_ASSIGN(ScriptingThrottler);
+  };
+
+  ScriptingThrottler scripting_throttler_;
+
   bool print_node_in_progress_;
   PrintPreviewContext print_preview_context_;
   bool is_loading_;
   bool is_scripted_preview_delayed_;
   base::WeakPtrFactory<PrintWebViewHelper> weak_ptr_factory_;
 
   // Used to fix a race condition where the source is a PDF and print preview
   // hangs because RequestPrintPreview is called before DidStopLoading() is
   // called. This is a store for the RequestPrintPreview() call and its
   // parameters so that it can be invoked after DidStopLoading.
   base::Closure on_stop_loading_closure_;
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_