Fix a problem that video does not show up in Chrome Shell.

chrome/android/shell/java/src/org/chromium/chrome/shell/TabManager.java

Index: chrome/android/shell/java/src/org/chromium/chrome/shell/TabManager.java
diff --git a/chrome/android/shell/java/src/org/chromium/chrome/shell/TabManager.java b/chrome/android/shell/java/src/org/chromium/chrome/shell/TabManager.java
index 3a2d2945b6ae8507f34b4bab003166be8e3fa64f..025b1f2562f7eff1a72092e0d6cf20eeb3f33c20 100644
--- a/chrome/android/shell/java/src/org/chromium/chrome/shell/TabManager.java
+++ b/chrome/android/shell/java/src/org/chromium/chrome/shell/TabManager.java
@@ -79,6 +79,15 @@ public class TabManager extends LinearLayout {
     }
 
     /**
+     * Enter or leave overlay video mode.
+     * @param enabled Whether overlay mode is enabled.
+     */
+    public void setOverlayVideoMode(boolean enabled) {
+        if (mContentViewRenderView == null) return;
+        mContentViewRenderView.setOverlayVideoMode(enabled);
+    }
+
+    /**
      * @return The currently visible {@link ChromeShellTab}.
      */
     public ChromeShellTab getCurrentTab() {