Make the vast majority of JS headers private to src/javascript.

fpdfsdk/src/javascript/JS_Runtime.h

Index: fpdfsdk/src/javascript/JS_Runtime.h
diff --git a/fpdfsdk/include/javascript/JS_Runtime.h b/fpdfsdk/src/javascript/JS_Runtime.h
similarity index 89%
rename from fpdfsdk/include/javascript/JS_Runtime.h
rename to fpdfsdk/src/javascript/JS_Runtime.h
index 6fdc4b0708797a629d97f8fb4232cd03a27713b8..ac8c532b53cbf5951218c99dc29eb0374f224281 100644
--- a/fpdfsdk/include/javascript/JS_Runtime.h
+++ b/fpdfsdk/src/javascript/JS_Runtime.h
@@ -4,15 +4,15 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef FPDFSDK_INCLUDE_JAVASCRIPT_JS_RUNTIME_H_
-#define FPDFSDK_INCLUDE_JAVASCRIPT_JS_RUNTIME_H_
+#ifndef FPDFSDK_SRC_JAVASCRIPT_JS_RUNTIME_H_
+#define FPDFSDK_SRC_JAVASCRIPT_JS_RUNTIME_H_
 
 #include <set>
 #include <utility>
 
 #include "../../../core/include/fxcrt/fx_basic.h"
-#include "../jsapi/fxjs_v8.h"
-#include "IJavaScript.h"
+#include "../../include/javascript/IJavaScript.h"
+#include "../../include/jsapi/fxjs_v8.h"
 #include "JS_EventHandler.h"
 
 class CJS_Context;
@@ -69,4 +69,4 @@ class CJS_Runtime : public IFXJS_Runtime {
   std::set<Observer*> m_observers;
 };
 
-#endif  // FPDFSDK_INCLUDE_JAVASCRIPT_JS_RUNTIME_H_
+#endif  // FPDFSDK_SRC_JAVASCRIPT_JS_RUNTIME_H_