Add documentation for platform/bindings

third_party/WebKit/Source/platform/bindings/ScriptWrappable.h

Index: third_party/WebKit/Source/platform/bindings/ScriptWrappable.h
diff --git a/third_party/WebKit/Source/platform/bindings/ScriptWrappable.h b/third_party/WebKit/Source/platform/bindings/ScriptWrappable.h
index d98084bae4e57c5a3c43a5b599f622400eb4c9c1..762b8d0b5c1416eaa497e2c93ba4e2c1932259af 100644
--- a/third_party/WebKit/Source/platform/bindings/ScriptWrappable.h
+++ b/third_party/WebKit/Source/platform/bindings/ScriptWrappable.h
@@ -56,7 +56,7 @@ class PLATFORM_EXPORT TraceWrapperBase {
 // JavaScript object (platform object).  ToV8() converts a ScriptWrappable to
 // a v8::Object and toScriptWrappable() converts a v8::Object back to
 // a ScriptWrappable.  v8::Object as platform object is called "wrapper object".
-// The wrapepr object for the main world is stored in ScriptWrappable.  Wrapper
+// The wrapper object for the main world is stored in ScriptWrappable.  Wrapper
 // objects for other worlds are stored in DOMWrapperMap.
 class PLATFORM_EXPORT ScriptWrappable : public TraceWrapperBase {
   WTF_MAKE_NONCOPYABLE(ScriptWrappable);