WIP: Migrate generated bindings to new ExceptionState constructor.

Source/core/frame/DOMWindowBase64.cpp

Index: Source/core/frame/DOMWindowBase64.cpp
diff --git a/Source/core/frame/DOMWindowBase64.cpp b/Source/core/frame/DOMWindowBase64.cpp
index 2d2e1f7c3240a3d747745426761edbd16ab1f592..2f43d507a7734917ebc143b517e977046fca3b5c 100644
--- a/Source/core/frame/DOMWindowBase64.cpp
+++ b/Source/core/frame/DOMWindowBase64.cpp
@@ -48,7 +48,7 @@ String btoa(void*, const String& stringToEncode, ExceptionState& exceptionState)
         return String();
 
     if (!stringToEncode.containsOnlyLatin1()) {
-        exceptionState.throwDOMException(InvalidCharacterError, "'btoa' failed: The string to be encoded contains characters outside of the Latin1 range.");
+        exceptionState.throwDOMException(InvalidCharacterError, "The string to be encoded contains characters outside of the Latin1 range.");
         return String();
     }
 
@@ -61,12 +61,12 @@ String atob(void*, const String& encodedString, ExceptionState& exceptionState)
         return String();
 
     if (!encodedString.containsOnlyLatin1()) {
-        exceptionState.throwDOMException(InvalidCharacterError, "'atob' failed: The string to be decoded contains characters outside of the Latin1 range.");
+        exceptionState.throwDOMException(InvalidCharacterError, "The string to be decoded contains characters outside of the Latin1 range.");
         return String();
     }
     Vector<char> out;
     if (!base64Decode(encodedString, out, isHTMLSpace<UChar>, Base64ValidatePadding)) {
-        exceptionState.throwDOMException(InvalidCharacterError, "'atob' failed: The string to be decoded is not correctly encoded.");
+        exceptionState.throwDOMException(InvalidCharacterError, "The string to be decoded is not correctly encoded.");
         return String();
     }