Fix incorrect Y translation in infobars

This patch adds resets the Y offset of the infobar container on
navigation to clear any stale values from the previous page.

Bug: 1012695, 1069955
Change-Id: Idccc26471c178850f2ed820e3b567bd6d5970819
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2461708
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Pavel Yatsuk <pavely@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816533}

chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarContainer.java

@@ -89,6 +89,12 @@ public class InfoBarContainer implements UserData, KeyboardVisibilityListener, I
 
     /** Resets the state of the InfoBarContainer when the user navigates. */
     private final TabObserver mTabObserver = new EmptyTabObserver() {
+        @Override
+        public void onDidStartNavigation(Tab tab, NavigationHandle navigationHandle) {
+            // Make sure Y translation is reset on navigation.
+            if (mInfoBarContainerView != null) mInfoBarContainerView.setTranslationY(0);
+        }
+
         @Override
         public void onDidFinishNavigation(Tab tab, NavigationHandle navigation) {
             if (navigation.hasCommitted() && navigation.isInMainFrame()) {