Implement OverlayPanels as SceneOverlays

chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/StaticLayout.java

Index: chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/StaticLayout.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/StaticLayout.java b/chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/StaticLayout.java
index 4375a0c36fe689c41c618b2c6c14fff902cc46a6..d2bb422689dfd8285b3f59c2dd6b1dad80231087 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/StaticLayout.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/StaticLayout.java
@@ -10,7 +10,6 @@ import android.os.Handler;
 
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.compositor.LayerTitleCache;
-import org.chromium.chrome.browser.compositor.bottombar.OverlayPanel;
 import org.chromium.chrome.browser.compositor.bottombar.OverlayPanelManager;
 import org.chromium.chrome.browser.compositor.layouts.components.LayoutTab;
 import org.chromium.chrome.browser.compositor.layouts.content.TabContentManager;
@@ -31,7 +30,7 @@ import java.util.LinkedList;
  * {@link #tabSelecting(long, int)} call, and is used to show a thumbnail of a {@link Tab}
  * until that {@link Tab} is ready to be shown.
  */
-public class StaticLayout extends ContextualSearchSupportedLayout {
+public class StaticLayout extends Layout {
     public static final String TAG = "StaticLayout";
 
     private static final int HIDE_TIMEOUT_MS = 2000;
@@ -67,7 +66,7 @@ public class StaticLayout extends ContextualSearchSupportedLayout {
      */
     public StaticLayout(Context context, LayoutUpdateHost updateHost, LayoutRenderHost renderHost,
             EventFilter eventFilter, OverlayPanelManager panelManager) {
-        super(context, updateHost, renderHost, eventFilter, panelManager);
+        super(context, updateHost, renderHost, eventFilter);
 
         mHandler = new Handler();
         mUnstallRunnable = new UnstallRunnable();
@@ -240,13 +239,6 @@ public class StaticLayout extends ContextualSearchSupportedLayout {
                 mRenderHost.getTopControlsUrlBarAlpha(), fullscreenManager, resourceManager,
                 forceHideTopControlsAndroidView(), getSizingFlags());
 
-        // TODO(pedrosimonetti): Coordinate w/ dtrainor@ to improve integration with TreeProvider.
-        SceneLayer overlayLayer = null;
-        OverlayPanel panel = mPanelManager.getActivePanel();
-        if (panel != null && panel.isShowing()) {
-            overlayLayer = super.getSceneLayer();
-        }
-
         // TODO(dtrainor): Find the best way to properly track this metric for cold starts.
         // We should probably erase the thumbnail when we select a tab that we need to restore.
         if (tabContentManager != null