add dumpHex option to rect and rrect, to match path

src/core/SkStringUtils.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkString.h"
 #include "SkStringUtils.h"
 
 void SkAddFlagToString(SkString* string, bool flag, const char* flagStr, bool* needSeparator) {
     if (flag) {
         if (*needSeparator) {
             string->append("|");
         }
         string->append(flagStr);
         *needSeparator = true;
     }
 }
+
+void SkAppendScalar(SkString* str, SkScalar value, SkScalarAsStringType asType) {
+    switch (asType) {
+        case kHex_SkScalarAsStringType:
+            str->appendf("SkBits2Float(0x%08x)", SkFloat2Bits(value));
+            break;
+        case kDec_SkScalarAsStringType: {
+            SkString tmp;
+            tmp.printf("%g", value);
+            if (tmp.contains('.')) {
+                tmp.appendUnichar('f');
+            }
+            str->append(tmp);
+            break;
+        }
+    }
+}
+