Ignore print() during page dismissal.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

Index: third_party/WebKit/Source/web/ChromeClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.cpp b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
index bd99a02304a0e02d7f39cb47b7c583ee6d183010..cabcb6f2901e3f37c6f7023e625fc8735aed4d40 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -139,6 +139,8 @@ const char* DialogTypeToString(ChromeClient::DialogType dialog_type) {
       return "confirm";
     case ChromeClient::kPromptDialog:
       return "prompt";
+    case ChromeClient::kPrintDialog:
+      return "print";
     case ChromeClient::kHTMLDialog:
       NOTREACHED();
   }