Use Web IDL Union types in Service Worker's Cache interface

Source/bindings/tests/results/core/UnionTypesCore.cpp

Index: Source/bindings/tests/results/core/UnionTypesCore.cpp
diff --git a/Source/bindings/tests/results/core/UnionTypesCore.cpp b/Source/bindings/tests/results/core/UnionTypesCore.cpp
index dbf00dfdb9c2abcc70e8ea75bde134acd6739a33..3134f77fb758eddc6f574324958c71ed82e06d7a 100644
--- a/Source/bindings/tests/results/core/UnionTypesCore.cpp
+++ b/Source/bindings/tests/results/core/UnionTypesCore.cpp
@@ -93,7 +93,6 @@ void V8BooleanOrStringOrUnrestrictedDouble::toImpl(v8::Isolate* isolate, v8::Han
         return;
     }
 
-    exceptionState.throwTypeError("Not a valid union member.");
 }
 
 v8::Handle<v8::Value> toV8(BooleanOrStringOrUnrestrictedDouble& impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
@@ -162,7 +161,6 @@ void V8DoubleOrString::toImpl(v8::Isolate* isolate, v8::Handle<v8::Value> v8Valu
         return;
     }
 
-    exceptionState.throwTypeError("Not a valid union member.");
 }
 
 v8::Handle<v8::Value> toV8(DoubleOrString& impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
@@ -319,7 +317,6 @@ void V8StringOrArrayBufferOrArrayBufferView::toImpl(v8::Isolate* isolate, v8::Ha
         return;
     }
 
-    exceptionState.throwTypeError("Not a valid union member.");
 }
 
 v8::Handle<v8::Value> toV8(StringOrArrayBufferOrArrayBufferView& impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
@@ -388,7 +385,6 @@ void V8StringOrDouble::toImpl(v8::Isolate* isolate, v8::Handle<v8::Value> v8Valu
         return;
     }
 
-    exceptionState.throwTypeError("Not a valid union member.");
 }
 
 v8::Handle<v8::Value> toV8(StringOrDouble& impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
@@ -459,7 +455,6 @@ void V8TestInterfaceGarbageCollectedOrString::toImpl(v8::Isolate* isolate, v8::H
         return;
     }
 
-    exceptionState.throwTypeError("Not a valid union member.");
 }
 
 v8::Handle<v8::Value> toV8(TestInterfaceGarbageCollectedOrString& impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
@@ -531,7 +526,6 @@ void V8TestInterfaceOrLong::toImpl(v8::Isolate* isolate, v8::Handle<v8::Value> v
         return;
     }
 
-    exceptionState.throwTypeError("Not a valid union member.");
 }
 
 v8::Handle<v8::Value> toV8(TestInterfaceOrLong& impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)