chrome/android: Push EventFilters into the Layout implementations.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.compositor.layouts;
 
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.os.Build;
 import android.util.SparseArray;
 import android.view.MotionEvent;
 import android.view.ViewGroup;
 
 import org.chromium.chrome.browser.ChromeApplication;
 import org.chromium.chrome.browser.UrlConstants;
 import org.chromium.chrome.browser.compositor.bottombar.OverlayPanelContentViewDelegate;
 import org.chromium.chrome.browser.compositor.bottombar.OverlayPanelManager;
 import org.chromium.chrome.browser.compositor.bottombar.contextualsearch.ContextualSearchPanel;
 import org.chromium.chrome.browser.compositor.bottombar.readermode.ReaderModePanel;
 import org.chromium.chrome.browser.compositor.layouts.components.LayoutTab;
 import org.chromium.chrome.browser.compositor.layouts.components.VirtualView;
 import org.chromium.chrome.browser.compositor.layouts.content.TabContentManager;
 import org.chromium.chrome.browser.compositor.layouts.eventfilter.EdgeSwipeHandler;
 import org.chromium.chrome.browser.compositor.layouts.eventfilter.EmptyEdgeSwipeHandler;
-import org.chromium.chrome.browser.compositor.layouts.eventfilter.GestureHandler;
 import org.chromium.chrome.browser.compositor.layouts.eventfilter.ScrollDirection;
 import org.chromium.chrome.browser.compositor.overlays.SceneOverlay;
 import org.chromium.chrome.browser.compositor.scene_layer.ToolbarSceneLayer;
 import org.chromium.chrome.browser.contextualsearch.ContextualSearchManagementDelegate;
 import org.chromium.chrome.browser.device.DeviceClassManager;
 import org.chromium.chrome.browser.dom_distiller.ReaderModeManagerDelegate;
 import org.chromium.chrome.browser.fullscreen.FullscreenManager;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.TabCreatorManager;
 import org.chromium.chrome.browser.tabmodel.TabModel;
@@ skipping 14 matching lines @@
  */
 public class LayoutManagerDocument extends LayoutManager
         implements OverlayPanelContentViewDelegate {
     // Layouts
     /** A {@link Layout} used for showing a normal web page. */
     protected final StaticLayout mStaticLayout;
 
     // Event Filters
     private final EdgeSwipeHandler mToolbarSwipeHandler;
 
-    // Event Filter Handlers
-    /** A {@link GestureHandler} that will delegate all events to {@link #getActiveLayout()}. */
-    protected final GestureHandler mGestureHandler;
-
     // Internal State
     private final SparseArray<LayoutTab> mTabCache = new SparseArray<LayoutTab>();
     private final ContextualSearchPanel mContextualSearchPanel;
     private final ReaderModePanel mReaderModePanel;
     private final OverlayPanelManager mOverlayPanelManager;
     private final ToolbarSceneLayer mToolbarOverlay;
     /** A delegate for interacting with the Contextual Search manager. */
     protected ContextualSearchManagementDelegate mContextualSearchDelegate;
 
     private final Context mContext;
 
     @SuppressWarnings("unused") private TabModelSelectorTabObserver mTabModelSelectorTabObserver;
 
     /**
      * Creates a {@link LayoutManagerDocument} instance.
      * @param host            A {@link LayoutManagerHost} instance.
      */
     public LayoutManagerDocument(LayoutManagerHost host) {
         super(host);
         mContext = host.getContext();
         LayoutRenderHost renderHost = host.getLayoutRenderHost();
 
         mToolbarOverlay = new ToolbarSceneLayer(mContext, this, renderHost);
 
         // Build Event Filter Handlers
-        mGestureHandler = new GestureHandlerLayoutDelegate(this);
         mToolbarSwipeHandler = new ToolbarSwipeHandler(this);
 
         mOverlayPanelManager = new OverlayPanelManager();
 
         // Build Layouts
         mStaticLayout = new StaticLayout(mContext, this, renderHost, null, mOverlayPanelManager);
 
         // Contextual Search scene overlay.
         mContextualSearchPanel = new ContextualSearchPanel(mContext, this, mOverlayPanelManager);
 
@@ skipping 288 matching lines @@
                     || !FeatureUtilities.isDocumentModeEligible(mHost.getContext())
                     || !DeviceClassManager.enableToolbarSwipe()
                     || (manager != null && manager.getPersistentFullscreenMode())) {
                 return false;
             }
 
             return direction == ScrollDirection.LEFT || direction == ScrollDirection.RIGHT;
         }
     }
 }