Add documentation for platform/bindings

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

Index: third_party/WebKit/Source/platform/bindings/DOMWrapperMap.h
diff --git a/third_party/WebKit/Source/platform/bindings/DOMWrapperMap.h b/third_party/WebKit/Source/platform/bindings/DOMWrapperMap.h
index 87a63afa5799d1c6048928d6f366346bebba9123..5f59dfe380bcfd81f7fe1d700e91b683dd3c538b 100644
--- a/third_party/WebKit/Source/platform/bindings/DOMWrapperMap.h
+++ b/third_party/WebKit/Source/platform/bindings/DOMWrapperMap.h
@@ -42,6 +42,8 @@
 
 namespace blink {
 
+// Used to store and maintain a mapping between C++ objects and JavaScript
+// wrappers created for those objects.

[jbroman, 2017/04/28 19:07:03]

nit: "between" isn't clear about the direction (the other direction is of course
the wrapped value field). Maybe something along the lines of "Maps from C++
objects to their corresponding JavaScript wrappers. See also DOMDataStore."

[adithyas, 2017/04/28 20:19:43]

Oh right! This made sense in my head .. fixed.

 template <class KeyType>
 class DOMWrapperMap {
   USING_FAST_MALLOC(DOMWrapperMap);