Merge to XFA: Tidy up CPDFDOC_Environment.

Original Review URL: https://codereview.chromium.org/1235393002 .
(cherry picked from commit fb07e2843dad0774d5842c2b08e7792164efc14a)

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1244503002 .
diff --git a/fpdfsdk/src/javascript/global.cpp b/fpdfsdk/src/javascript/global.cpp
index e829d7f..52b79d3 100644
--- a/fpdfsdk/src/javascript/global.cpp
+++ b/fpdfsdk/src/javascript/global.cpp
@@ -118,19 +118,14 @@
 
 global_alternate::~global_alternate(void)
 {
-	ASSERT(m_pApp != NULL);
 	DestroyGlobalPersisitentVariables();
-
-	CJS_RuntimeFactory* pFactory = CPDFXFA_App::GetInstance()->GetRuntimeFactory();
-	pFactory->ReleaseGlobalData();
+	CPDFXFA_App::GetInstance()->GetRuntimeFactory()->ReleaseGlobalData();
 }
 
 void global_alternate::Initial(CPDFDoc_Environment* pApp)
 {
 	m_pApp = pApp;
-
-	CJS_RuntimeFactory* pFactory = CPDFXFA_App::GetInstance()->GetRuntimeFactory();
-	m_pGlobalData = pFactory->NewGlobalData(pApp);
+	m_pGlobalData = CPDFXFA_App::GetInstance()->GetRuntimeFactory()->NewGlobalData(pApp);
 	UpdateGlobalPersistentVariables();
 }