Update gm so it doe not write the size of the pdf (writeData writes the length of the data too)

gm/gmmain.cpp

Index: gm/gmmain.cpp
===================================================================
--- gm/gmmain.cpp	(revision 8173)
+++ gm/gmmain.cpp	(working copy)
@@ -282,7 +282,7 @@
                                const SkDynamicMemoryWStream& document) {
         SkFILEWStream stream(path.c_str());
         SkAutoDataUnref data(document.copyToData());

[epoger, 2013/03/15 17:01:46]

Filed https://code.google.com/p/skia/issues/detail?id=1167 ('update docs for
SkStream.readData() and SkStream.writeData() to indicate length is included') to
Mike.

-        return stream.writeData(data.get());
+        return stream.write(data.get()->data(), data.get()->size());

[epoger, 2013/03/15 17:01:46]

Also, Mike... does stream.write() guarantee that it will always write out all of
the data?  I tried to address this in
https://codereview.appspot.com/7300071/#msg5 , but I never heard back from you
on it.

[epoger, 2013/03/28 20:20:44]

The last question here is whether write() is guaranteed to write out all of the
data passed in, or if it might only write out part of it.

Mike?

     }
 
     /**