Support fullscreen video for content shell

content/shell/android/java/src/org/chromium/content_shell/Shell.java

Index: content/shell/android/java/src/org/chromium/content_shell/Shell.java
diff --git a/content/shell/android/java/src/org/chromium/content_shell/Shell.java b/content/shell/android/java/src/org/chromium/content_shell/Shell.java
index cb8c99542748ac428e25ca8d973b5d7c74fbda1f..a928a02093f4de0c577213036feda0b76f06fa4f 100644
--- a/content/shell/android/java/src/org/chromium/content_shell/Shell.java
+++ b/content/shell/android/java/src/org/chromium/content_shell/Shell.java
@@ -63,6 +63,7 @@ public class Shell extends LinearLayout {
     private WindowAndroid mWindow;
 
     private boolean mLoading = false;
+    private boolean mIsFullscreen = false;
 
     /**
      * Constructor for inflating via XML.
@@ -261,11 +262,14 @@ public class Shell extends LinearLayout {
 
     @CalledByNative
     private void toggleFullscreenModeForTab(boolean enterFullscreen) {
+        mIsFullscreen = enterFullscreen;
+        LinearLayout toolBar = (LinearLayout) findViewById(R.id.toolbar);
+        toolBar.setVisibility(enterFullscreen ? GONE : VISIBLE);
     }
 
     @CalledByNative
     private boolean isFullscreenForTabOrPending() {
-        return false;
+        return mIsFullscreen;
     }
 
     @SuppressWarnings("unused")