[vr] Call VrShellDelegate.onNewIntent with the correct activity

Before this CL, we were using the last focused activity to create VrShellDelegate
when we got a new auto present intent. This breaks when Chrome is already
running in the background because CTA is focused after VrShellDelegate handles
the intent. As a result of this, ChromeLaucherActivity is the last focused
activity and we never ended up auto presenting. See bug for more details.

With this CL, we pass the activity into VrShellDelegate.onNewIntent and use that
to create VrShellDelegate.

BUG=733258

Review-Url: https://codereview.chromium.org/2938873004
Cr-Commit-Position: refs/heads/master@{#479768}

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

@@ -1095,7 +1095,7 @@ public void processUrlViewIntent(String url, String referer, String headers,
 
             // We send this intent so that we can enter WebVr presentation mode if needed. This
             // call doesn't consume the intent because it also has the url that we need to load.
-            VrShellDelegate.onNewIntent(intent);
+            VrShellDelegate.onNewIntent(ChromeTabbedActivity.this, intent);
 
             TabModel tabModel = getCurrentTabModel();
             boolean fromLauncherShortcut = IntentUtils.safeGetBooleanExtra(

chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java

@@ -676,13 +676,12 @@ private void onAutopresentIntent() {
     /**
      * This is called every time ChromeActivity gets a new intent.
      */
-    public static void onNewIntent(Intent intent) {
+    public static void onNewIntent(ChromeActivity activity, Intent intent) {
         if (IntentUtils.safeGetBooleanExtra(intent, DAYDREAM_VR_EXTRA, false)
                 && ChromeFeatureList.isEnabled(ChromeFeatureList.WEBVR_AUTOPRESENT)
-                && activitySupportsAutopresentation(
-                           ApplicationStatus.getLastTrackedFocusedActivity())
+                && activitySupportsAutopresentation(activity)
                 && IntentHandler.isIntentFromTrustedApp(intent, DAYDREAM_HOME_PACKAGE)) {
-            VrShellDelegate instance = getInstance();
+            VrShellDelegate instance = getInstance(activity);
             if (instance == null) return;
             instance.onAutopresentIntent();
         }