Rename CPDFSDK_Environment to CPDFSDK_FormfillEnvironment

fpdfsdk/formfiller/cffl_formfiller.h

Index: fpdfsdk/formfiller/cffl_formfiller.h
diff --git a/fpdfsdk/formfiller/cffl_formfiller.h b/fpdfsdk/formfiller/cffl_formfiller.h
index 430717113d853a9946f6a3661ac04e292da98657..4771551feda661377c87698863138149ddf3f014 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.h
+++ b/fpdfsdk/formfiller/cffl_formfiller.h
@@ -14,13 +14,13 @@
 #include "fpdfsdk/pdfsdk_fieldaction.h"
 
 class CPDFSDK_Annot;
-class CPDFSDK_Environment;
+class CPDFSDK_FormfillEnvironment;
 class CPDFSDK_PageView;
 class CPDFSDK_Widget;
 
 class CFFL_FormFiller : public IPWL_Provider, public CPWL_TimerHandler {
  public:
-  CFFL_FormFiller(CPDFSDK_Environment* pEnv, CPDFSDK_Annot* pAnnot);
+  CFFL_FormFiller(CPDFSDK_FormfillEnvironment* pEnv, CPDFSDK_Annot* pAnnot);
   ~CFFL_FormFiller() override;
 
   virtual FX_RECT GetViewBBox(CPDFSDK_PageView* pPageView,
@@ -161,7 +161,7 @@ class CFFL_FormFiller : public IPWL_Provider, public CPWL_TimerHandler {
   // until the PWL_Edit is done with it. pdfium:566
   void DestroyWindows();
 
-  CPDFSDK_Environment* m_pEnv;
+  CPDFSDK_FormfillEnvironment* m_pEnv;
   CPDFSDK_Widget* m_pWidget;
   CPDFSDK_Annot* m_pAnnot;
 
@@ -172,7 +172,7 @@ class CFFL_FormFiller : public IPWL_Provider, public CPWL_TimerHandler {
 
 class CFFL_Button : public CFFL_FormFiller {
  public:
-  CFFL_Button(CPDFSDK_Environment* pEnv, CPDFSDK_Annot* pWidget);
+  CFFL_Button(CPDFSDK_FormfillEnvironment* pEnv, CPDFSDK_Annot* pWidget);
   ~CFFL_Button() override;
 
   // CFFL_FormFiller