bindings: Moves custom getters/setters to the prototype chain.

LayoutTests/webexposed/global-interface-listing-expected.txt

Index: LayoutTests/webexposed/global-interface-listing-expected.txt
diff --git a/LayoutTests/webexposed/global-interface-listing-expected.txt b/LayoutTests/webexposed/global-interface-listing-expected.txt
index 0b667cf87e3f8f7f32d75ccb1c6a75a87d4c9db2..6c0715f12fac8b16043d9b954b7dbfc1f8873e4a 100644
--- a/LayoutTests/webexposed/global-interface-listing-expected.txt
+++ b/LayoutTests/webexposed/global-interface-listing-expected.txt
@@ -649,6 +649,7 @@ interface CryptoKey
     getter usages
     method constructor
 interface CustomEvent
+    getter detail
     method constructor
     method initCustomEvent
 interface DOMError
@@ -1378,6 +1379,7 @@ interface Error
     method toString
 interface ErrorEvent
     getter colno
+    getter error
     getter filename
     getter lineno
     getter message
@@ -2528,11 +2530,13 @@ interface HTMLOptionElement
     setter text
     setter value
 interface HTMLOptionsCollection
+    getter length
     getter selectedIndex
     method add
     method constructor
     method namedItem
     method remove
+    setter length
     setter selectedIndex
 interface HTMLOutputElement
     getter defaultValue
@@ -3321,6 +3325,7 @@ interface MessageChannel
     getter port2
     method constructor
 interface MessageEvent
+    getter data
     getter lastEventId
     getter origin
     getter ports
@@ -3747,6 +3752,7 @@ interface PluginArray
     method namedItem
     method refresh
 interface PopStateEvent
+    getter state
     method constructor
 interface Presentation
     getter onavailablechange
@@ -6446,6 +6452,8 @@ interface XMLHttpRequest
     attribute UNSENT
     getter onreadystatechange
     getter readyState
+    getter response
+    getter responseText
     getter responseType
     getter responseURL
     getter responseXML