Chrome OS - Change lockscreen dropdown arrow color

Changes the color of the dropdown arrow to switch between users
to Google Grey 200.

Fixed: 1006436
Change-Id: Ie4c1151e4dee2dc201378cdb111667e7b1b89680
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2036175
Auto-Submit: Renato Silva <rrsilva@google.com>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738199}

ash/login/ui/login_user_view.cc

@@ -329,7 +329,7 @@ LoginUserView::LoginUserView(
         gfx::Size(kDropdownIconSizeDp, kDropdownIconSizeDp));
     dropdown_->SetImage(
         views::Button::STATE_NORMAL,
-        gfx::CreateVectorIcon(kLockScreenDropdownIcon, SK_ColorWHITE));
+        gfx::CreateVectorIcon(kLockScreenDropdownIcon, gfx::kGoogleGrey200));
     dropdown_->SetFocusBehavior(FocusBehavior::ALWAYS);
   }
   tap_button_ = new TapButton(this);

ash/resources/vector_icons/lock_screen_dropdown.icon

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-PATH_COLOR_ARGB, 0x57, 0xFF, 0xFF, 0xFF,
 MOVE_TO, 33.18f, 17.18f,
 LINE_TO, 24, 26.34f,
 R_LINE_TO, -9.18f, -9.16f,
@@ -12,7 +11,6 @@ R_LINE_TO, 12, -12,
 CLOSE
 
 CANVAS_DIMENSIONS, 24,
-PATH_COLOR_ARGB, 0x57, 0xFF, 0xFF, 0xFF,
 MOVE_TO, 16.59f, 8.59f,
 LINE_TO, 12, 13.17f,
 LINE_TO, 7.41f, 8.59f,