Support underline on Linux again.

ui/gfx/font_render_params_linux_unittest.cc

 // Copyright 2014 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/font_render_params.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "build/build_config.h"
@@ skipping 13 matching lines @@
   TestFontDelegate() {}
   ~TestFontDelegate() override {}
 
   void set_params(const FontRenderParams& params) { params_ = params; }
 
   FontRenderParams GetDefaultFontRenderParams() const override {
     return params_;
   }
   void GetDefaultFontDescription(std::string* family_out,
                                  int* size_pixels_out,
-                                 bool* italic_out,
+                                 int* style_out,
                                  Font::Weight* weight_out,
                                  FontRenderParams* params_out) const override {
     NOTIMPLEMENTED();
   }
 
  private:
   FontRenderParams params_;
 
   DISALLOW_COPY_AND_ASSIGN(TestFontDelegate);
 };
@@ skipping 334 matching lines @@
   EXPECT_EQ("Verdana", suggested_family);
 
   query.families.clear();
   query.families.push_back("Arial");
   suggested_family.clear();
   GetFontRenderParams(query, &suggested_family);
   EXPECT_EQ("Verdana", suggested_family);
 }
 
 }  // namespace gfx