Launch Chrome when phone inserted into Daydream headset IFF Chrome was the active app

chrome/android/java_sources.gni

Index: chrome/android/java_sources.gni
diff --git a/chrome/android/java_sources.gni b/chrome/android/java_sources.gni
index c48adbda53fc7f9077f0d70d54510cbb82f76015..5b23edab382f9bb7a00b1d9246c87b79007dcd58 100644
--- a/chrome/android/java_sources.gni
+++ b/chrome/android/java_sources.gni
@@ -985,6 +985,7 @@ chrome_java_sources = [
   "java/src/org/chromium/chrome/browser/util/UrlUtilities.java",
   "java/src/org/chromium/chrome/browser/util/ViewUtils.java",
   "java/src/org/chromium/chrome/browser/vr_shell/NonPresentingGvrContext.java",
+  "java/src/org/chromium/chrome/browser/vr_shell/VrDaydreamApi.java",
   "java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java",
   "java/src/org/chromium/chrome/browser/vr_shell/VrShell.java",
   "java/src/org/chromium/chrome/browser/webapps/ActivityAssigner.java",
@@ -1095,6 +1096,7 @@ if (!is_official_build) {
 
 chrome_vr_java_sources = [
   "java/src/org/chromium/chrome/browser/vr_shell/NonPresentingGvrContextImpl.java",
+  "java/src/org/chromium/chrome/browser/vr_shell/VrDaydreamApiImpl.java",
   "java/src/org/chromium/chrome/browser/vr_shell/VrShellImpl.java",
   "java/src/org/chromium/chrome/browser/vr_shell/VrWindowAndroid.java",
 ]