Revised CL for customisable logging (replacing printfs).

runtime/bin/log_android.cc

Index: runtime/bin/log_android.cc
===================================================================
--- runtime/bin/log_android.cc	(revision 0)
+++ runtime/bin/log_android.cc	(revision 0)
@@ -0,0 +1,20 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "bin/log.h"
+
+#include <stdio.h>
+#include <android/log.h>
+
+// TODO(gram): We should be buffering the data and only outputting
+// it when we see a '\n'.
+
+void Log::VPrint(const char* format, va_list args) {
+  __android_log_vprint(ANDROID_LOG_INFO, "Dart", format, args);
+}
+
+void Log::VPrintErr(const char* format, va_list args) {
+  __android_log_vprint(ANDROID_LOG_ERROR, "Dart", format, args);
+}
+