Adds Mojo IDL.

third_party/WebKit/Source/bindings/core/v8/custom/V8MojoWatcherCustom.cpp

Index: third_party/WebKit/Source/bindings/core/v8/custom/V8MojoWatcherCustom.cpp
diff --git a/third_party/WebKit/Source/bindings/modules/v8/custom/V8WebGLRenderingContextCustom.cpp b/third_party/WebKit/Source/bindings/core/v8/custom/V8MojoWatcherCustom.cpp
similarity index 50%
copy from third_party/WebKit/Source/bindings/modules/v8/custom/V8WebGLRenderingContextCustom.cpp
copy to third_party/WebKit/Source/bindings/core/v8/custom/V8MojoWatcherCustom.cpp
index 25f583f867da6dad5b646ec67e8165c19984a337..5fe88912435ea16a6d29014053d7e8b0b8b01463 100644
--- a/third_party/WebKit/Source/bindings/modules/v8/custom/V8WebGLRenderingContextCustom.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/custom/V8MojoWatcherCustom.cpp
@@ -2,21 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "bindings/modules/v8/V8WebGLRenderingContext.h"
+#include "bindings/core/v8/V8MojoWatcher.h"
 
-#include "modules/webgl/WebGLRenderingContextBase.h"
-
-using namespace WTF;
+#include "bindings/core/v8/MojoWatchCallback.h"
 
 namespace blink {
 
-void V8WebGLRenderingContext::visitDOMWrapperCustom(
+void V8MojoWatcher::visitDOMWrapperCustom(
     v8::Isolate* isolate,
     ScriptWrappable* scriptWrappable,
     const v8::Persistent<v8::Object>& wrapper) {
-  WebGLRenderingContext* impl =
-      scriptWrappable->toImpl<WebGLRenderingContext>();
-  impl->visitChildDOMWrappers(isolate, wrapper);
+  MojoWatcher* watcher = scriptWrappable->toImpl<MojoWatcher>();
+  watcher->m_callback->setWrapperReference(isolate, wrapper);
 }
 
 }  // namespace blink