GTTF: Use a fresh TestingBrowserProcess for each test, part #4

chrome/browser/ui/gtk/gtk_theme_service_unittest.cc

 // Copyright (c) 2011 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 <gtk/gtk.h>
 
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/gtk/gtk_theme_service.h"
 #include "chrome/common/pref_names.h"
+#include "chrome/test/testing_browser_process_test.h"
 #include "chrome/test/testing_profile.h"
 #include "grit/theme_resources.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 // Converts a GdkColor to a SkColor.
 SkColor GdkToSkColor(GdkColor* color) {
   return SkColorSetRGB(color->red >> 8,
                        color->green >> 8,
                        color->blue >> 8);
 }
 
 }  // namespace
 
-class GtkThemeServiceTest : public testing::Test {
+class GtkThemeServiceTest : public TestingBrowserProcessTest {
  public:
   GtkThemeServiceTest() : provider_(NULL) {}
 
   void SetUseGtkTheme(bool use_gtk_theme) {
     profile_.GetPrefs()->SetBoolean(prefs::kUsesSystemTheme, use_gtk_theme);
   }
 
   void BuildProvider() {
     provider_ = GtkThemeService::GetFrom(&profile_);
   }
@@ skipping 24 matching lines @@
   // large, implied global state, it would take some IN_PROCESS_BROWSER_TESTS
   // to write an equivalent of DefaultValues above in a way that wouldn't make
   // other tests flaky. kColorTabText is the only simple path where there's no
   // weird calculations for edge cases so use that as a simple test.
   GtkWidget* fake_label = provider_->fake_label();
   GtkStyle* label_style = gtk_rc_get_style(fake_label);
   GdkColor label_color = label_style->fg[GTK_STATE_NORMAL];
   EXPECT_EQ(provider_->GetColor(ThemeService::COLOR_TAB_TEXT),
             GdkToSkColor(&label_color));
 }