Revert of 📰 Adjust the card display depending on the screen width.

chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/DisplayStyleObserverAdapter.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/DisplayStyleObserverAdapter.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/DisplayStyleObserverAdapter.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/DisplayStyleObserverAdapter.java
deleted file mode 100644
index 90fffb675cabac9898ee341f257e41c39e886349..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/DisplayStyleObserverAdapter.java
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright 2016 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.ntp.cards;
-
-import android.view.View;
-
-import org.chromium.chrome.browser.ntp.DisplayStyleObserver;
-import org.chromium.chrome.browser.ntp.UiConfig;
-
-/**
- * Implementation of {@link DisplayStyleObserver} designed to play nicely with
- * {@link android.support.v7.widget.RecyclerView}. It will not notify of changes when the
- * associated view is not attached to the window.
- */
-public class DisplayStyleObserverAdapter
-        implements DisplayStyleObserver, View.OnAttachStateChangeListener {
-    private final DisplayStyleObserver mObserver;
-
-    /** Current display style, gets updated as the UiConfig detects changes and notifies us. */
-    @UiConfig.DisplayStyle
-    private int mCurrentDisplayStyle;
-
-    /**
-     * Latest value that we transmitted to the adapted observer. If we didn't transfer any yet,
-     * the value is not a valid {@code DisplayStyle}
-     */
-    @UiConfig.DisplayStyle
-    private Integer mNotifiedDisplayStyle;
-
-    private boolean mIsViewAttached;
-
-    /**
-     * @param view the view whose lifecycle is tracked to determine when to not fire the
-     *             observer.
-     * @param config the {@link UiConfig} object to subscribe to.
-     * @param observer the observer to adapt. It's {#onDisplayStyleChanged} will be called when
-     *                 the configuration changes, provided that {@code view} is attached to the
-     *                 window.
-     */
-    public DisplayStyleObserverAdapter(View view, UiConfig config, DisplayStyleObserver observer) {
-        mObserver = observer;
-
-        // TODO(dgn): getParent() is not a good way to test that, but isAttachedToWindow()
-        // requires API 19.
-        mIsViewAttached = view.getParent() != null;
-
-        view.addOnAttachStateChangeListener(this);
-
-        // This call will also assign the initial value to |mCurrentDisplayStyle|
-        config.addObserver(this);
-    }
-
-    @Override
-    public void onDisplayStyleChanged(@UiConfig.DisplayStyle int newDisplayStyle) {
-        mCurrentDisplayStyle = newDisplayStyle;
-
-        if (!mIsViewAttached) return;
-        if (mNotifiedDisplayStyle != null && mCurrentDisplayStyle == mNotifiedDisplayStyle) return;
-
-        mNotifiedDisplayStyle = mCurrentDisplayStyle;
-
-        mObserver.onDisplayStyleChanged(mCurrentDisplayStyle);
-    }
-
-    @Override
-    public void onViewAttachedToWindow(View v) {
-        mIsViewAttached = true;
-        onDisplayStyleChanged(mCurrentDisplayStyle);
-    }
-
-    @Override
-    public void onViewDetachedFromWindow(View v) {
-        mIsViewAttached = false;
-    }
-
-    @UiConfig.DisplayStyle
-    public int getDisplayStyle() {
-        return mCurrentDisplayStyle;
-    }
-}