Make //mojo/edk/js a component.

mojo/edk/js/support.h

Index: mojo/edk/js/support.h
diff --git a/mojo/edk/js/support.h b/mojo/edk/js/support.h
index c57cf7a1a89e147ffadca97ba7202b65f2461fbd..551f5ac0a82fb0ba281a5bf044ef502193572583 100644
--- a/mojo/edk/js/support.h
+++ b/mojo/edk/js/support.h
@@ -5,13 +5,14 @@
 #ifndef MOJO_EDK_JS_SUPPORT_H_
 #define MOJO_EDK_JS_SUPPORT_H_
 
+#include "mojo/edk/js/js_export.h"
 #include "v8/include/v8.h"
 
 namespace mojo {
 namespace edk {
 namespace js {
 
-class Support {
+class MOJO_JS_EXPORT Support {
  public:
   static const char kModuleName[];
   static v8::Local<v8::Value> GetModule(v8::Isolate* isolate);