Fix showing app menu in multi-window when not the focused window.

In multi-window, the non-focused window will have the state of
paused even though it is fully visible.  So look for resumed only
when in non-multi-window, but accept paused when in multi-window.

This differs from MultiWindowUtils.isActivityVisible because that
only mentions visibility, but I am aiming for visible and not
occluded.

BUG=845785,844787

Change-Id: Ifcca3784b899a4a19132b3b57efd5227dc2b3e90
Reviewed-on: https://chromium-review.googlesource.com/1076894
Reviewed-by: Theresa <[email protected]>
Commit-Queue: Ted Choc <[email protected]>
Cr-Original-Commit-Position: refs/heads/master@{#562587}(cherry picked from commit cdc84cb)
Reviewed-on: https://chromium-review.googlesource.com/1081076
Reviewed-by: Ted Choc <[email protected]>
Cr-Commit-Position: refs/branch-heads/3440@{#71}
Cr-Branched-From: 010ddcf-refs/heads/master@{#561733}

Author: Ted Choc

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java

@@ -1438,7 +1438,12 @@ public boolean isInOverviewMode() {
     public boolean shouldShowAppMenu() {
         if (isActivityDestroyed()) return false;
 
-        if (ApplicationStatus.getStateForActivity(this) != ActivityState.RESUMED) return false;
+        @ActivityState
+        int state = ApplicationStatus.getStateForActivity(this);
+        boolean inMultiWindow = MultiWindowUtils.getInstance().isInMultiWindowMode(this);
+        if (state != ActivityState.RESUMED && (!inMultiWindow || state != ActivityState.PAUSED)) {
+            return false;
+        }
 
         // Do not show the menu if Contextual Search panel is opened.
         if (mContextualSearchManager != null && mContextualSearchManager.isSearchPanelOpened()) {