Add skia extension to allow setting default fontmgr on linux. Use it to allow the linux blimp clien…

skia/ext/fontmgr_default_linux.h

Index: skia/ext/fontmgr_default_linux.h
diff --git a/skia/ext/fontmgr_default_linux.h b/skia/ext/fontmgr_default_linux.h
new file mode 100644
index 0000000000000000000000000000000000000000..dc39b139e0329f34351b7c65ccfcd0cfca206968
--- /dev/null
+++ b/skia/ext/fontmgr_default_linux.h
@@ -0,0 +1,15 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SKIA_EXT_FONTMGR_DEFAULT_LINUX_H_
+#define SKIA_EXT_FONTMGR_DEFAULT_LINUX_H_
+
+#include "third_party/skia/include/core/SkRefCnt.h"
+#include "third_party/skia/include/core/SkTypes.h"
+
+class SkFontMgr;
+
+void SK_API SetDefaultSkiaFactory(sk_sp<SkFontMgr> fontmgr);
+
+#endif  // SKIA_EXT_FONTMGR_DEFAULT_LINUX_H_