Disable the context menu on the keyboard overlay and the print dialog.

chrome/browser/printing/print_dialog_cloud.cc

Index: chrome/browser/printing/print_dialog_cloud.cc
diff --git a/chrome/browser/printing/print_dialog_cloud.cc b/chrome/browser/printing/print_dialog_cloud.cc
index ea88472424d18ea92dd43403c79b0a63f94c1673..ad3e7a56328cadc74a35fffe98cb5d8cfbd9dd94 100644
--- a/chrome/browser/printing/print_dialog_cloud.cc
+++ b/chrome/browser/printing/print_dialog_cloud.cc
@@ -506,6 +506,11 @@ bool CloudPrintHtmlDialogDelegate::ShouldShowDialogTitle() const {
   return false;
 }
 
+bool CloudPrintHtmlDialogDelegate::HandleContextMenu(
+    const ContextMenuParams& params) {
+  return true;
+}
+
 // Called from the UI thread, starts up the dialog.
 void CreateDialogImpl(const FilePath& path_to_file,
                       const string16& print_job_title,