Add Pepper TrueType font API call to enumerate fonts in a given family.

ppapi/tests/test_truetype_font.h

 // Copyright (c) 2013 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 PAPPI_TESTS_TEST_TRUETYPE_FONT_H_
 #define PAPPI_TESTS_TEST_TRUETYPE_FONT_H_
 
 #include <string>
 
 #include "ppapi/c/dev/ppb_truetype_font_dev.h"
 #include "ppapi/c/ppb_core.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/tests/test_case.h"
 
 class TestTrueTypeFont : public TestCase {
  public:
   explicit TestTrueTypeFont(TestingInstance* instance);
   virtual ~TestTrueTypeFont();
 
  private:
   // TestCase implementation.
   virtual bool Init();
   virtual void RunTests(const std::string& filter);
 
   std::string TestGetFontFamilies();
+  std::string TestGetFontsInFamily();
   std::string TestCreate();
   std::string TestDescribe();
   std::string TestGetTableTags();
   std::string TestGetTable();
 
   const PPB_TrueTypeFont_Dev* ppb_truetype_font_interface_;
   const PPB_Core* ppb_core_interface_;
   const PPB_Var* ppb_var_interface_;
 };
 
 #endif  // PAPPI_TESTS_TEST_TRUETYPE_FONT_H_