Convert CPDFSDK_ActionHandler to CPDFSDK_FormFillEnvironment

This CL replaces CPDFSDK_Document with CPDFSDK_FormFillEnvironment in
CPDFSDK_ActionHandler.

Review-Url: https://codereview.chromium.org/2397933003
diff --git a/fpdfsdk/cpdfsdk_interform.cpp b/fpdfsdk/cpdfsdk_interform.cpp
index 69698ea..005079d 100644
--- a/fpdfsdk/cpdfsdk_interform.cpp
+++ b/fpdfsdk/cpdfsdk_interform.cpp
@@ -363,8 +363,7 @@
   fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(0);
   fa.sValue = csValue;
   pActionHandler->DoAction_FieldJavaScript(action, CPDF_AAction::KeyStroke,
-                                           m_pFormFillEnv->GetSDKDocument(),
-                                           pFormField, fa);
+                                           m_pFormFillEnv, pFormField, fa);
   return fa.bRC;
 }
 
@@ -384,8 +383,7 @@
   fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(0);
   fa.sValue = csValue;
   pActionHandler->DoAction_FieldJavaScript(action, CPDF_AAction::Validate,
-                                           m_pFormFillEnv->GetSDKDocument(),
-                                           pFormField, fa);
+                                           m_pFormFillEnv, pFormField, fa);
   return fa.bRC;
 }