Fix tint when home button is enabled after toolbar visual is updated

Bug: 750809
Change-Id: I8f5ea254870bfc8309988e12d29dea7b35f5fd41
Reviewed-on: https://chromium-review.googlesource.com/676465Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Becky Zhou <huayinz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#503508}

chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarPhone.java

@@ -1484,6 +1484,7 @@ public class ToolbarPhone extends ToolbarLayout
         if (mIsHomeButtonEnabled) {
             mHomeButton.setVisibility(urlHasFocus() || isTabSwitcherAnimationRunning()
                     ? INVISIBLE : VISIBLE);
+            mHomeButton.setTint(mUseLightToolbarDrawables ? mLightModeTint : mDarkModeTint);
             mBrowsingModeViews.add(mHomeButton);
         } else {
             mHomeButton.setVisibility(GONE);