Remove FX_DWORD from fpdfsdk/ and testing

BUG=

Review URL: https://codereview.chromium.org/1835693002
diff --git a/fpdfsdk/javascript/app.cpp b/fpdfsdk/javascript/app.cpp
index 2f81791..41fa152 100644
--- a/fpdfsdk/javascript/app.cpp
+++ b/fpdfsdk/javascript/app.cpp
@@ -383,7 +383,7 @@
   }
 
   CJS_Runtime* pRuntime = pContext->GetJSRuntime();
-  FX_DWORD dwInterval = params.size() > 1 ? params[1].ToInt() : 1000;
+  uint32_t dwInterval = params.size() > 1 ? params[1].ToInt() : 1000;
 
   CPDFDoc_Environment* pApp = pRuntime->GetReaderApp();
   ASSERT(pApp);
@@ -421,7 +421,7 @@
     return TRUE;
   }
 
-  FX_DWORD dwTimeOut = params.size() > 1 ? params[1].ToInt() : 1000;
+  uint32_t dwTimeOut = params.size() > 1 ? params[1].ToInt() : 1000;
 
   CPDFDoc_Environment* pApp = pRuntime->GetReaderApp();
   ASSERT(pApp);