Add documentation for platform/bindings

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 38 matching lines @@
   TraceWrapperBase() = default;
   virtual bool IsScriptWrappable() const { return false; }
 
   DECLARE_VIRTUAL_TRACE_WRAPPERS(){};
 };
 
 // ScriptWrappable provides a way to map from/to C++ DOM implementation to/from
 // 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);
 
  public:
   ScriptWrappable() {}
 
   bool IsScriptWrappable() const override { return true; }
 
   template <typename T>
@@ skipping 134 matching lines @@
 #define DECLARE_WRAPPERTYPEINFO()                             \
  public:                                                      \
   const WrapperTypeInfo* GetWrapperTypeInfo() const override; \
                                                               \
  private:                                                     \
   typedef void end_of_define_wrappertypeinfo_not_reached_t
 
 }  // namespace blink
 
 #endif  // ScriptWrappable_h