[omnibox] Correct tab switch button icon color

...to standard Chrome icon color.

Bug: 780835
Change-Id: Ie377265d7f50a8598075aca9b7868239750b2c6f
Reviewed-on: https://chromium-review.googlesource.com/1104787
Commit-Queue: Kevin Bailey <krb@chromium.org>
Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568098}

chrome/browser/ui/views/omnibox/omnibox_tab_switch_button.cc

@@ -14,6 +14,7 @@
 #include "components/strings/grit/components_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/animation/slide_animation.h"
+#include "ui/gfx/color_palette.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/paint_vector_icon.h"
 
@@ -34,7 +35,7 @@ OmniboxTabSwitchButton::OmniboxTabSwitchButton(OmniboxPopupContentsView* model,
   SetImage(STATE_NORMAL,
            gfx::CreateVectorIcon(omnibox::kSwitchIcon,
                                  GetLayoutConstant(LOCATION_BAR_ICON_SIZE),
-                                 SK_ColorBLACK));
+                                 gfx::kChromeIconGrey));
   SetHorizontalAlignment(gfx::ALIGN_LEFT);
   if (!calculated_widths_) {
     icon_only_width_ = MdTextButton::CalculatePreferredSize().width();