Add size_t bytesWritten() const to SkWStream.

src/core/SkStream.cpp

Index: src/core/SkStream.cpp
diff --git a/src/core/SkStream.cpp b/src/core/SkStream.cpp
index 70f97d2f7c7fc1d5e828ef1c376e80dc8f886510..e766a1b35e7c18c52e327b8274ff02d244b51a6e 100644
--- a/src/core/SkStream.cpp
+++ b/src/core/SkStream.cpp
@@ -806,6 +806,7 @@ void SkDebugWStream::newline()
 {
 #if defined(SK_DEBUG) || defined(SK_DEVELOPER)
     SkDebugf("\n");
+    fBytesWritten++;
 #endif
 }
 
@@ -817,6 +818,7 @@ bool SkDebugWStream::write(const void* buffer, size_t size)
     s[size] = 0;
     SkDebugf("%s", s);
     delete[] s;
+    fBytesWritten += size+1;
 #endif

[hal.canary, 2014/03/06 18:23:45]

are you sure this isn't just size?  printf doesn't write the trailing '\0',
that's just a signal to stop printing.

In Release, should fBytesWritten always == 0?  That's what this seems to do.

[mtklein, 2014/03/06 18:28:11]

Oh, good catch.  This should be += size.

It seems fine that bytesWritten() always returns 0 in release.  It's consistent
with the bytes actually written.

     return true;
 }