Fix wrong icon tint used for find toolbar

A small fix from CL
https://chromium-review.googlesource.com/c/chromium/src/+/1489416

Bug: 934525
Change-Id: Ied35119645b543678562248e2f4d533767b2ce41
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1504296Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Becky Zhou <huayinz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637881}

chrome/android/java/src/org/chromium/chrome/browser/util/ColorUtils.java

@@ -89,7 +89,7 @@ public class ColorUtils {
      * @return The {@link ColorRes} for the icon tint.
      */
     public static @ColorRes int getIconTintRes(boolean useLight) {
-        return useLight ? R.color.standard_mode_tint : R.color.tint_on_dark_bg;
+        return useLight ? R.color.tint_on_dark_bg : R.color.standard_mode_tint;
     }
 
     /**