Split fsdk_mgr files apart.

This CL separates the CPDFDoc_Environment, CPDFSDK_Document and CPDFSDK_PageView
classes into their own h and cpp files.

Review-Url: https://codereview.chromium.org/2335243002
diff --git a/fpdfsdk/javascript/PublicMethods.cpp b/fpdfsdk/javascript/PublicMethods.cpp
index 749c8d7..5a793f4 100644
--- a/fpdfsdk/javascript/PublicMethods.cpp
+++ b/fpdfsdk/javascript/PublicMethods.cpp
@@ -11,8 +11,9 @@
 
 #include "core/fpdfdoc/include/cpdf_interform.h"
 #include "core/fxcrt/include/fx_ext.h"
+#include "fpdfsdk/include/cpdfdoc_environment.h"
+#include "fpdfsdk/include/cpdfsdk_document.h"
 #include "fpdfsdk/include/cpdfsdk_interform.h"
-#include "fpdfsdk/include/fsdk_mgr.h"
 #include "fpdfsdk/javascript/Field.h"
 #include "fpdfsdk/javascript/JS_Define.h"
 #include "fpdfsdk/javascript/JS_EventHandler.h"