Support autopresenting WebVr content.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
index 771ca11fd63452ba1506e495019e7ad30a36e239..5e3707078bb1419a958685efa3f3e28cc08f5457 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
@@ -867,6 +867,9 @@ public class ChromeTabbedActivity extends ChromeActivity implements OverviewMode
                     mIntentWithEffect = mIntentHandler.onNewIntent(intent);
                 }
 
+                // We send this intent so that we can enter WebVr presentation mode if needed.

[mthiesse, 2017/05/11 14:25:17]

This should probably live in ChromeActivity in case we want to support
autopresent from other activities in the future as well.

[ymalik, 2017/05/11 17:22:56]

Totally. At first I was worried because the first run bit only exists in
ChromeTabbedActivity, but we probably don't want to autopresent after a first
run anyway, so this is easy. Done.

+                VrShellDelegate.onNewIntent(this, getIntent());
+
                 if (isMainIntentFromLauncher(intent)) {
                     if (IntentHandler.getUrlFromIntent(intent) == null) {
                         assert !mIntentWithEffect