Fix SK_API for DirectWrite port.

The declaration and definition should have the same calling convention.

TBR=reed@google.com

Review URL: https://codereview.chromium.org/317993002
diff --git a/src/ports/SkFontMgr_win_dw.cpp b/src/ports/SkFontMgr_win_dw.cpp
index fe82258c..8633775 100644
--- a/src/ports/SkFontMgr_win_dw.cpp
+++ b/src/ports/SkFontMgr_win_dw.cpp
@@ -728,8 +728,9 @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+#include "SkTypeface_win.h"
 
-SkFontMgr* SkFontMgr_New_DirectWrite(IDWriteFactory* factory) {
+SK_API SkFontMgr* SkFontMgr_New_DirectWrite(IDWriteFactory* factory) {
     if (NULL == factory) {
         factory = sk_get_dwrite_factory();
         if (NULL == factory) {
@@ -761,11 +762,8 @@
                                               localeName, localeNameLen));
 }
 
-////////////////////////////////////////////////////////////////////////////////
-
 #include "SkFontMgr_indirect.h"
-#include "SkTypeface_win.h"
-SkFontMgr* SkFontMgr_New_DirectWriteRenderer(SkRemotableFontMgr* proxy) {
+SK_API SkFontMgr* SkFontMgr_New_DirectWriteRenderer(SkRemotableFontMgr* proxy) {
     SkAutoTUnref<SkFontMgr> impl(SkFontMgr_New_DirectWrite());
     if (impl.get() == NULL) {
         return NULL;