Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/webapps/FullScreenActivity.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.webapps;
+
+import android.content.Intent;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.google.android.apps.chrome.R;
+
+import org.chromium.chrome.browser.CompositorChromeActivity;
+import org.chromium.chrome.browser.compositor.layouts.LayoutManagerDocument;
+import org.chromium.chrome.browser.tabmodel.SingleTabModelSelector;
+import org.chromium.chrome.browser.tabmodel.TabModel.TabSelectionType;
+import org.chromium.chrome.browser.widget.ControlContainer;
+
+import java.io.File;
+
+/**
+ * Base class for task-focused activities that need to display web content in a nearly UI-less
+ * Chrome (InfoBars still appear).
+ *
+ * This is vaguely analogous to a WebView, but in Chrome. Example applications that might use this
+ * Activity would be webapps and streaming media activities - anything where user interaction with
+ * the regular browser's UI is either unnecessary or undesirable.
+ * Subclasses can override {@link #createUI()} if they need something more exotic.
+ *
+ * TODO(dfalcantara, andrewhayden): Consider not using a Tab here once all initialization is cleaned
+ *                                  up: crbug.com/270973
+ */
+public abstract class FullScreenActivity extends CompositorChromeActivity
+        implements FullScreenActivityTab.TopControlsVisibilityDelegate {
+    private FullScreenActivityTab mTab;
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        setIntent(intent);
+    }
+
+    @Override
+    public void preInflationStartup() {
+        super.preInflationStartup();
+        setTabModelSelector(new SingleTabModelSelector(this, false, true));
+    }
+
+    @Override
+    public void finishNativeInitialization() {
+        mTab = FullScreenActivityTab.create(
+                this, getWindowAndroid(), getActivityDirectory(), getSavedInstanceState(), this);
+        getTabModelSelector().setTab(mTab);
+        mTab.show(TabSelectionType.FROM_NEW);
+
+        ControlContainer controlContainer = (ControlContainer) findViewById(R.id.control_container);
+        initializeCompositorContent(new LayoutManagerDocument(getCompositorViewHolder()),
+                (View) controlContainer, (ViewGroup) findViewById(android.R.id.content),
+                controlContainer);
+
+        getActivityTab().setFullscreenManager(getFullscreenManager());
+        super.finishNativeInitialization();
+    }
+
+    @Override
+    public SingleTabModelSelector getTabModelSelector() {
+        return (SingleTabModelSelector) super.getTabModelSelector();
+    }
+
+    @Override
+    public final FullScreenActivityTab getActivityTab() {
+        return mTab;
+    }
+
+    /**
+     * @return {@link File} pointing at a directory specific for this class.
+     */
+    protected File getActivityDirectory() {
+        return null;
+    }
+
+    // Implements {@link FullScreenActivityTab.TopControlsVisibilityDelegate}.
+    @Override
+    public boolean shouldShowTopControls(String url, int securityLevel) {
+        return false;
+    }
+
+    @Override
+    protected boolean handleBackPressed() {
+        if (mTab == null) return false;
+        if (mTab.canGoBack()) {
+            mTab.goBack();
+            return true;
+        }
+        return false;
+    }
+}