Add a ScopedPangoFontDescription helper class and use it.

ui/gfx/platform_font_pango_unittest.cc

Index: ui/gfx/platform_font_pango_unittest.cc
===================================================================
--- ui/gfx/platform_font_pango_unittest.cc	(revision 137485)
+++ ui/gfx/platform_font_pango_unittest.cc	(working copy)
@@ -10,6 +10,8 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/pango_util.h"
 
+namespace gfx {
+
 // Fails on Chrome OS: http://crbug.com/124451
 #if defined(OS_CHROMEOS)
 #define MAYBE_FamilyList FAILS_FamilyList
@@ -20,16 +22,19 @@
 // Test that PlatformFontPango is able to cope with PangoFontDescriptions
 // containing multiple font families.  The first family should be preferred.
 TEST(PlatformFontPangoTest, MAYBE_FamilyList) {
-  PangoFontDescription* desc =
-      pango_font_description_from_string("Arial,Times New Roman, 13px");
-  scoped_refptr<gfx::PlatformFontPango> font(new gfx::PlatformFontPango(desc));
-  pango_font_description_free(desc);
+  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());
 
-  desc = pango_font_description_from_string("Times New Roman,Arial, 15px");
-  scoped_refptr<gfx::PlatformFontPango> font2(new gfx::PlatformFontPango(desc));
-  pango_font_description_free(desc);
+  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());
 }
+
+}  // namespace gfx