Add Commit to SkWIStream.
http://codereview.appspot.com/4809069/



git-svn-id: http://skia.googlecode.com/svn/trunk@2017 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/utils/win/SkIStream.cpp b/src/utils/win/SkIStream.cpp
index a857f40..4d5cd77 100644
--- a/src/utils/win/SkIStream.cpp
+++ b/src/utils/win/SkIStream.cpp
@@ -241,6 +241,11 @@
 }
 
 // IStream Interface
+HRESULT STDMETHODCALLTYPE SkWIStream::Commit(DWORD) {
+    this->fSkWStream->flush();
+    return S_OK;
+}
+
 HRESULT STDMETHODCALLTYPE SkWIStream::Stat(STATSTG* pStatstg
                                          , DWORD grfStatFlag)
 {