linux: Avoid leak in PlatformFontPangoTest.FamilyList.

ui/gfx/platform_font_pango_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "ui/gfx/platform_font_pango.h"
 
+#include <cairo/cairo.h>
+#include <fontconfig/fontconfig.h>
+#include <pango/pangocairo.h>
+#include <pango/pangofc-fontmap.h>
+
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/pango_util.h"
 
 namespace gfx {
 
 // Test that PlatformFontPango is able to cope with PangoFontDescriptions
 // containing multiple font families.  The first family should be preferred.
 TEST(PlatformFontPangoTest, FamilyList) {
   ScopedPangoFontDescription desc(
       pango_font_description_from_string("Arial,Times New Roman, 13px"));
   scoped_refptr<gfx::PlatformFontPango> font(
       new gfx::PlatformFontPango(desc.get()));
   EXPECT_EQ("Arial", font->GetFontName());
   EXPECT_EQ(13, font->GetFontSize());
 
   ScopedPangoFontDescription desc2(
       pango_font_description_from_string("Times New Roman,Arial, 15px"));
   scoped_refptr<gfx::PlatformFontPango> font2(
       new gfx::PlatformFontPango(desc2.get()));
   EXPECT_EQ("Times New Roman", font2->GetFontName());
   EXPECT_EQ(15, font2->GetFontSize());
+
+  // Free memory allocated by FontConfig (http://crbug.com/114750).
+  pango_fc_font_map_cache_clear(
+      PANGO_FC_FONT_MAP(pango_cairo_font_map_get_default()));
+  cairo_debug_reset_static_data();
+  FcFini();
 }
 
 }  // namespace gfx