Rename CPDFSDK_Environment to CPDFSDK_FormfillEnvironment

Rename CPDFSDK_Environment to make it explicit that this is part of the formfill
system.

Review-Url: https://codereview.chromium.org/2391313002
diff --git a/fpdfsdk/javascript/PublicMethods.cpp b/fpdfsdk/javascript/PublicMethods.cpp
index 106f27e..3e2bc06 100644
--- a/fpdfsdk/javascript/PublicMethods.cpp
+++ b/fpdfsdk/javascript/PublicMethods.cpp
@@ -12,7 +12,7 @@
 #include "core/fpdfdoc/cpdf_interform.h"
 #include "core/fxcrt/fx_ext.h"
 #include "fpdfsdk/cpdfsdk_document.h"
-#include "fpdfsdk/cpdfsdk_environment.h"
+#include "fpdfsdk/cpdfsdk_formfillenvironment.h"
 #include "fpdfsdk/cpdfsdk_interform.h"
 #include "fpdfsdk/javascript/Field.h"
 #include "fpdfsdk/javascript/JS_Define.h"
@@ -80,7 +80,7 @@
 }
 
 void AlertIfPossible(CJS_Context* pContext, const FX_WCHAR* swMsg) {
-  CPDFSDK_Environment* pEnv = pContext->GetReaderEnv();
+  CPDFSDK_FormFillEnvironment* pEnv = pContext->GetReaderEnv();
   if (pEnv)
     pEnv->JS_appAlert(swMsg, nullptr, 0, 3);
 }