Factor out ContentViewAndroidDelegate

device/power_save_blocker/android/java/src/org/chromium/device/power_save_blocker/PowerSaveBlocker.java

Index: device/power_save_blocker/android/java/src/org/chromium/device/power_save_blocker/PowerSaveBlocker.java
diff --git a/device/power_save_blocker/android/java/src/org/chromium/device/power_save_blocker/PowerSaveBlocker.java b/device/power_save_blocker/android/java/src/org/chromium/device/power_save_blocker/PowerSaveBlocker.java
index 3638d98071e6e51afe80efc1da5ab0e9fa2f7028..c29dfe32eb80650bf604b936c3918272af42eb35 100644
--- a/device/power_save_blocker/android/java/src/org/chromium/device/power_save_blocker/PowerSaveBlocker.java
+++ b/device/power_save_blocker/android/java/src/org/chromium/device/power_save_blocker/PowerSaveBlocker.java
@@ -8,7 +8,6 @@ import android.view.View;
 
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
-import org.chromium.ui.base.ViewAndroidDelegate;
 
 import java.lang.ref.WeakReference;
 
@@ -25,22 +24,21 @@ class PowerSaveBlocker {
     private PowerSaveBlocker() {}
 
     @CalledByNative
-    private void applyBlock(ViewAndroidDelegate delegate) {
+    private void applyBlock(View anchorView) {
         assert mKeepScreenOnView == null;
-        View anchorView = delegate.acquireAnchorView();
         mKeepScreenOnView = new WeakReference<>(anchorView);
-        delegate.setAnchorViewPosition(anchorView, 0, 0, 0, 0);
         anchorView.setKeepScreenOn(true);
     }
 
     @CalledByNative
-    private void removeBlock(ViewAndroidDelegate delegate) {
-        assert mKeepScreenOnView != null;
+    private void removeBlock() {
+        // mKeepScreenOnView may be null since it's possible that |applyBlock()|
+        // was not invoked due to having failed to acquire an anchor view.
+        if (mKeepScreenOnView == null) return;
         View anchorView = mKeepScreenOnView.get();
         mKeepScreenOnView = null;
         if (anchorView == null) return;
 
         anchorView.setKeepScreenOn(false);
-        delegate.releaseAnchorView(anchorView);
     }
 }