First stab at touch optimized omnibox auto-complete per sgabriel's mocks.

ui/gfx/native_theme.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_GFX_NATIVE_THEME_H_
 #define UI_GFX_NATIVE_THEME_H_
 #pragma once
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/ui_export.h"
@@ skipping 223 matching lines @@
     // Label
     kColorId_LabelEnabledColor,
     kColorId_LabelDisabledColor,
     kColorId_LabelBackgroundColor,
     // Textfield
     kColorId_TextfieldDefaultColor,
     kColorId_TextfieldDefaultBackground,
     kColorId_TextfieldSelectionColor,
     kColorId_TextfieldSelectionBackgroundFocused,
     kColorId_TextfieldSelectionBackgroundUnfocused,
+    // Colors for 3D controls
+    kColorId_ThreeDLightShadow,
+    kColorId_ThreeDShadow,
     // TODO(benrg): move other hardcoded colors here.
   };
 
   // Return a color from the system theme.
   virtual SkColor GetSystemColor(ColorId color_id) const = 0;
 
   // Returns a shared instance of the native theme.
   // The returned object should not be deleted by the caller.  This function
   // is not thread safe and should only be called from the UI thread.
   // Each port of NativeTheme should provide its own implementation of this
   // function, returning the port's subclass.
   static const NativeTheme* instance();
 
  protected:
   NativeTheme() {}
   virtual ~NativeTheme() {}
 
   static unsigned int thumb_inactive_color_;
   static unsigned int thumb_active_color_;
   static unsigned int track_color_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeTheme);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_THEME_H_