Remove useless function and typs in the V8Callback

Source/bindings/v8/V8Callback.h

Index: Source/bindings/v8/V8Callback.h
diff --git a/Source/bindings/v8/V8Callback.h b/Source/bindings/v8/V8Callback.h
index f6126243f2729247d8bded4b40e717b34a619219..574eebc0d0a3b242d7ee4c0d529d07dec572da84 100644
--- a/Source/bindings/v8/V8Callback.h
+++ b/Source/bindings/v8/V8Callback.h
@@ -31,49 +31,15 @@
 #ifndef V8Callback_h
 #define V8Callback_h
 
-#include "bindings/v8/ExceptionState.h"
 #include "bindings/v8/V8Binding.h"
-#include "core/dom/ExceptionCode.h"
 #include <v8.h>
 
 namespace WebCore {
 
-class ExecutionContext;
-
 // Returns false if the callback threw an exception, true otherwise.
 bool invokeCallback(ScriptState*, v8::Local<v8::Function> callback, int argc, v8::Handle<v8::Value> argv[]);
 bool invokeCallback(ScriptState*, v8::Local<v8::Function> callback, v8::Handle<v8::Value> thisValue, int argc, v8::Handle<v8::Value> argv[]);
 
-// FIXME: This file is used only by V8GeolocationCustom.cpp. Remove the custom binding and this file.
-enum CallbackAllowedValueFlag {
-    CallbackAllowUndefined = 1,
-    CallbackAllowNull = 1 << 1
-};
-
-typedef unsigned CallbackAllowedValueFlags;
-
-// 'FunctionOnly' is assumed for the created callback.
-template <typename V8CallbackType>
-PassOwnPtr<V8CallbackType> createFunctionOnlyCallback(v8::Local<v8::Value> value, unsigned index, bool& succeeded, v8::Isolate* isolate, ExceptionState& exceptionState, CallbackAllowedValueFlags acceptedValues = 0)
-{
-    succeeded = true;
-
-    if (value->IsUndefined() && (acceptedValues & CallbackAllowUndefined))
-        return nullptr;
-
-    if (value->IsNull() && (acceptedValues & CallbackAllowNull))
-        return nullptr;
-
-    if (!value->IsFunction()) {
-        succeeded = false;
-        exceptionState.throwDOMException(TypeMismatchError, ExceptionMessages::argumentNullOrIncorrectType(index, "Function"));
-        exceptionState.throwIfNeeded();
-        return nullptr;
-    }
-
-    return V8CallbackType::create(v8::Handle<v8::Function>::Cast(value), ScriptState::current(isolate));
-}
-
 } // namespace WebCore
 
 #endif // V8Callback_h