GTK: Use GTK+ theme selection colors and plumb them into webkit.

webkit/tools/test_shell/layout_test_controller.h

 // 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.
 
 /*
   LayoutTestController class:
   Bound to a JavaScript window.layoutTestController object using the
   CppBoundClass::BindToJavascript(), this allows layout tests that are run in
   the test_shell (or, in principle, any web page loaded into a client app built
   with this class) to control various aspects of how the tests are run and what
@@ skipping 199 matching lines @@
   void counterValueForElementById(
       const CppArgumentList& args, CppVariant* result);
 
   // Allows layout tests to start Timeline profiling.
   void setTimelineProfilingEnabled(const CppArgumentList& args,
                                    CppVariant* result);
 
   // Allows layout tests to exec scripts at WebInspector side.
   void evaluateInWebInspector(const CppArgumentList& args, CppVariant* result);
 
+  // Forces the selection colors for testing under Linux.
+  void forceRedSelectionColors(const CppArgumentList& args,
+                               CppVariant* result);
+
  public:
   // The following methods are not exposed to JavaScript.
   void SetWorkQueueFrozen(bool frozen) { work_queue_.set_frozen(frozen); }
 
   bool ShouldDumpAsText() { return dump_as_text_; }
   bool ShouldDumpEditingCallbacks() { return dump_editing_callbacks_; }
   bool ShouldDumpFrameLoadCallbacks() { return dump_frame_load_callbacks_; }
   void SetShouldDumpFrameLoadCallbacks(bool value) {
     dump_frame_load_callbacks_ = value;
   }
@@ skipping 158 matching lines @@
 
   static WorkQueue work_queue_;
 
   static CppVariant globalFlag_;
 
   // Bound variable counting the number of top URLs visited.
   static CppVariant webHistoryItemCount_;
 };
 
 #endif  // WEBKIT_TOOLS_TEST_SHELL_LAYOUT_TEST_CONTROLLER_H_