Use ContentViewCore's container view to keep screen on

ui/android/java/src/org/chromium/ui/ViewAndroid.java

Index: ui/android/java/src/org/chromium/ui/ViewAndroid.java
diff --git a/ui/android/java/src/org/chromium/ui/ViewAndroid.java b/ui/android/java/src/org/chromium/ui/ViewAndroid.java
index 0f0ca116a79c753f2058de2842c15b91ae4ebc2c..305a57029949d3cabe86fb141916499bd3f23983 100644
--- a/ui/android/java/src/org/chromium/ui/ViewAndroid.java
+++ b/ui/android/java/src/org/chromium/ui/ViewAndroid.java
@@ -4,6 +4,8 @@
 
 package org.chromium.ui;
 
+import android.view.View;
+
 import org.chromium.base.JNINamespace;
 import org.chromium.ui.ViewAndroidDelegate;
 import org.chromium.ui.WindowAndroid;
@@ -23,6 +25,8 @@ public class ViewAndroid {
     private int mNativeViewAndroid = 0;
     private final ViewAndroidDelegate mViewAndroidDelegate;
     private final WindowAndroid mWindowAndroid;
+    private int mKeepScreenOnCount;
+    private View mKeepScreenOnView;
 
     /**
      * Constructs a View object.
@@ -55,6 +59,26 @@ public class ViewAndroid {
         return mNativeViewAndroid;
     }
 
+    /**
+     * Set whether to keep screen on when this view is in foreground.
+     * @param keepScreenOn true if the screen needs to keep on.
+     */
+    public void setKeepScreenOn(boolean keepScreenOn) {
+        if (keepScreenOn) {
+            mKeepScreenOnCount++;
+            if (mKeepScreenOnCount == 1) {
+                mKeepScreenOnView = mViewAndroidDelegate.acquireAnchorView();
+                mKeepScreenOnView.setKeepScreenOn(true);
+            }
+        } else {

[joth, 2013/08/08 21:48:57]

suggest: assert mKeepScreenOnCount > 0

[michaelbai, 2013/08/09 17:46:51]

Done.

+            mKeepScreenOnCount--;
+            if (mKeepScreenOnCount == 0) {
+                mViewAndroidDelegate.releaseAnchorView(mKeepScreenOnView);
+                mKeepScreenOnView = null;
+            }
+        }
+    }
+
     private native int nativeInit(int windowPtr);
     private native void nativeDestroy(int nativeViewAndroid);
 }