Adding debug SkScalerContext which returns random mask formats

src/fonts/SkRandomScalerContext.h

Index: src/fonts/SkRandomScalerContext.h
diff --git a/src/fonts/SkGScalerContext.h b/src/fonts/SkRandomScalerContext.h
similarity index 76%
copy from src/fonts/SkGScalerContext.h
copy to src/fonts/SkRandomScalerContext.h
index 75f3ebedbdeadc980f47f6d9c17b08cb696f5fa5..8ad22beff04e6c47aff7a9855fb237307ae7dd4b 100644
--- a/src/fonts/SkGScalerContext.h
+++ b/src/fonts/SkRandomScalerContext.h
@@ -1,20 +1,25 @@
 /*
- * Copyright 2013 Google Inc.
+ * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-#ifndef SkGScalerContext_DEFINED
-#define SkGScalerContext_DEFINED
+#ifndef SkRandomScalerContext_DEFINED
+#define SkRandomScalerContext_DEFINED
 
 #include "SkScalerContext.h"
 #include "SkTypeface.h"
 
-class SkGTypeface : public SkTypeface {
+/*
+ * This scaler context is for debug only purposes.  It will 'randomly' but deterministically return
+ * LCD / A8 / BW / RBGA masks based off of the Glyph ID
+ */
+
+class SkRandomTypeface : public SkTypeface {
 public:
-    SkGTypeface(SkTypeface* proxy, const SkPaint&);
-    virtual ~SkGTypeface();
+    SkRandomTypeface(SkTypeface* proxy, const SkPaint&);
+    virtual ~SkRandomTypeface();
 
     SkTypeface* proxy() const { return fProxy; }
     const SkPaint& paint() const { return fPaint; }