Linux UI theming:...

chrome/app/chrome_dll_main.cc

 // Copyright (c) 2006-2008 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.
 
 // TODO(port): the ifdefs in here are a first step towards trying to determine
 // the correct abstraction for all the OS functionality required at this
 // stage of process initialization. It should not be taken as a final
 // abstraction.
 
 #include "build/build_config.h"
@@ skipping 375 matching lines @@
   } else if (process_type == switches::kPluginProcess) {
 #if defined(OS_WIN)
     rv = PluginMain(main_params);
 #endif
   } else if (process_type == switches::kWorkerProcess) {
 #if defined(OS_WIN)
     rv = WorkerMain(main_params);
 #endif
   } else if (process_type.empty()) {
 #if defined(OS_LINUX)
+    // Disable user theming.
+    gchar* default_gtkrc_files[] = { NULL };
+    gtk_rc_set_default_files(default_gtkrc_files);
+
     // gtk_init() can change |argc| and |argv|, but nobody else uses them.
     gtk_init(&argc, const_cast<char***>(&argv));
     // Register GTK assertions to go through our logging system.
     g_log_set_handler(NULL,  // All logging domains.
                       static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
                                                   G_LOG_FLAG_FATAL |
                                                   G_LOG_LEVEL_ERROR |
                                                   G_LOG_LEVEL_CRITICAL |
                                                   G_LOG_LEVEL_WARNING),
                       GtkFatalLogHandler,
                       NULL);
+
+    // This theme is chosen rather abritrarily. We set many colors ourselves,
+    // so we need to set a light theme or some of the colors will clash.
+    g_object_set(gtk_settings_get_default(),
+                 "gtk-theme-name", "Mist",
+                 NULL);
 #endif
 
     ScopedOleInitializer ole_initializer;
     rv = BrowserMain(main_params);
   } else {
     NOTREACHED() << "Unknown process type";
   }
 
   if (!process_type.empty()) {
     ResourceBundle::CleanupSharedInstance();
   }
 
 #if defined(OS_WIN)
 #ifdef _CRTDBG_MAP_ALLOC
   _CrtDumpMemoryLeaks();
 #endif  // _CRTDBG_MAP_ALLOC
 
   _Module.Term();
 #endif
 
   logging::CleanupChromeLogging();
 
   return rv;
 }