Remove non-standardize key code names from event_sender.

third_party/WebKit/LayoutTests/http/tests/misc/custom-context-menu.html

Index: third_party/WebKit/LayoutTests/http/tests/misc/custom-context-menu.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/misc/custom-context-menu.html b/third_party/WebKit/LayoutTests/http/tests/misc/custom-context-menu.html
index a277bd96aca20274602b0951901a57977f59b563..bba303516c8315786126017bde7b46863dae6573 100644
--- a/third_party/WebKit/LayoutTests/http/tests/misc/custom-context-menu.html
+++ b/third_party/WebKit/LayoutTests/http/tests/misc/custom-context-menu.html
@@ -131,39 +131,39 @@ var button = document.getElementById("button");
 var items = contextClickAndGetMenuItems(button);
 
 // Esc key to hide the context menu.
-eventSender.keyDown("escape");
+eventSender.keyDown("Escape");
 
 var buttonWithContextMenu = document.getElementById("button_with_contextmenu");
 var itemsWithCustomContextMenu = contextClickAndGetMenuItems(buttonWithContextMenu);
 
 // Esc key to hide the context menu.
-eventSender.keyDown("escape");
+eventSender.keyDown("Escape");
 
 var button1 = document.getElementById("button_1");
 var items1 = contextClickAndGetMenuItems(button1);
 
 // Esc key to hide the context menu.
-eventSender.keyDown("escape");
+eventSender.keyDown("Escape");
 
 var button2 = document.getElementById("button_2");
 document.getElementById("menu_2").addEventListener("show", cancel, false);
 var items2 = contextClickAndGetMenuItems(button2);
 
 // Esc key to hide the context menu.
-eventSender.keyDown("escape");
+eventSender.keyDown("Escape");
 
 var button3 = document.getElementById("button_3");
 document.getElementById("menu_3").addEventListener("show", removeMenu, false);
 var items3 = contextClickAndGetMenuItems(button3);
 
 // Esc key to hide the context menu.
-eventSender.keyDown("escape");
+eventSender.keyDown("Escape");
 
 var button4 = document.getElementById("button_4");
 var items4 = contextClickAndGetMenuItems(button4);
 
 // Esc key to hide the context menu.
-eventSender.keyDown("escape");
+eventSender.keyDown("Escape");
 
 var button5 = document.getElementById("button_5");
 var items5 = contextClickAndGetMenuItems(button5);