window.print() should close form validation bubble.

third_party/WebKit/Source/web/ChromeClientImpl.h

Index: third_party/WebKit/Source/web/ChromeClientImpl.h
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.h b/third_party/WebKit/Source/web/ChromeClientImpl.h
index fdff26b6b782130ab51248e7c7def3b998f8767d..9edea041605280bd5059f184ccac91828369c7ea 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.h
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.h
@@ -226,6 +226,8 @@ class WEB_EXPORT ChromeClientImpl final : public ChromeClient {
 
   double LastFrameTimeMonotonic() const override;
 
+  void RegisterPopupOpeningObserver(PopupOpeningObserver*) override;
+  void UnregisterPopupOpeningObserver(PopupOpeningObserver*) override;
   void NotifyPopupOpeningObservers() const;
 
   void InstallSupplements(LocalFrame&) override;
@@ -236,8 +238,6 @@ class WEB_EXPORT ChromeClientImpl final : public ChromeClient {
   explicit ChromeClientImpl(WebViewImpl*);
 
   bool IsChromeClientImpl() const override { return true; }
-  void RegisterPopupOpeningObserver(PopupOpeningObserver*) override;
-  void UnregisterPopupOpeningObserver(PopupOpeningObserver*) override;
 
   void SetCursor(const WebCursorInfo&, LocalFrame*);