Acquire tab.getTitle() on UI Thread

We now enforce that Tab attributes are acquired on the UI thread

Bug: 1117396
Change-Id: Ia7d41be25ae3dc201e8ad7a7f96255b7ca09f60d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2390869Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Commit-Queue: David Maunder <davidjm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804077}

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabObserver.java

@@ -203,10 +203,11 @@ public class CustomTabObserver extends EmptyTabObserver {
         if (mCustomTabsConnection == null) return;
         if (!mCustomTabsConnection.shouldSendNavigationInfoForSession(mSession)) return;
         if (tab.getWebContents() == null) return;
+        if (TextUtils.isEmpty(tab.getTitle())) return;
 
         ShareImageFileUtils.captureScreenshotForContents(tab.getWebContents(), mContentBitmapWidth,
                 mContentBitmapHeight, (Uri snapshotPath) -> {
-                    if (TextUtils.isEmpty(tab.getTitle()) && snapshotPath == null) return;
+                    if (snapshotPath == null) return;
                     mCustomTabsConnection.sendNavigationInfo(
                             mSession, tab.getUrlString(), tab.getTitle(), snapshotPath);
                 });