Animate close all tab when started while showing a tab.

It is now possible to execute "close_all_tabs" while showing a tab, that
is, while in a layout different from the overview, on a phone, such as
with a tab open. This works, but doesn't look good as there's no
animation registered for this case: the tab just close.

Background: go/chrome-direct-actions

This change proposes switching to the overview layout just before
closing all tab and then switching to the normal close all tab animation
and behavior.

Bug: b/140370009
Change-Id: I92e6c683f3f8212c2e4a77695e7101c5edad407b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1781425
Commit-Queue: Stephane Zermatten <szermatt@chromium.org>
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#693122}

chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/LayoutManagerChromePhone.java

@@ -59,6 +59,16 @@ public class LayoutManagerChromePhone extends LayoutManagerChrome {
         mSimpleAnimationLayout.setTabModelSelector(selector, content);
     }
 
+    @Override
+    public boolean closeAllTabsRequest(boolean incognito) {
+        if (getActiveLayout() == mStaticLayout && !incognito) {
+            startShowing(DeviceClassManager.enableAccessibilityLayout() ? mOverviewListLayout
+                                                                        : mOverviewLayout,
+                    /* animate= */ false);
+        }
+        return super.closeAllTabsRequest(incognito);
+    }
+
     @Override
     protected LayoutManagerTabModelObserver createTabModelObserver() {
         return new LayoutManagerTabModelObserver() {