Fix ChromeSwitches.DISABLE_FULLSCREEN to not overlap content.

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

 // Copyright 2014 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.tab;
 
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.ActivityManager;
 import android.content.Context;
@@ skipping 48 matching lines @@
 import org.chromium.chrome.browser.WebContentsFactory;
 import org.chromium.chrome.browser.banners.AppBannerManager;
 import org.chromium.chrome.browser.compositor.layouts.content.TabContentManager;
 import org.chromium.chrome.browser.contextmenu.ChromeContextMenuItemDelegate;
 import org.chromium.chrome.browser.contextmenu.ChromeContextMenuPopulator;
 import org.chromium.chrome.browser.contextmenu.ContextMenuParams;
 import org.chromium.chrome.browser.contextmenu.ContextMenuPopulator;
 import org.chromium.chrome.browser.contextmenu.ContextMenuPopulatorWrapper;
 import org.chromium.chrome.browser.crash.MinidumpUploadService;
 import org.chromium.chrome.browser.customtabs.CustomTabActivity;
+import org.chromium.chrome.browser.device.DeviceClassManager;
 import org.chromium.chrome.browser.document.DocumentUtils;
 import org.chromium.chrome.browser.document.DocumentWebContentsDelegate;
 import org.chromium.chrome.browser.download.ChromeDownloadDelegate;
 import org.chromium.chrome.browser.fullscreen.FullscreenManager;
 import org.chromium.chrome.browser.help.HelpAndFeedback;
 import org.chromium.chrome.browser.infobar.InfoBarContainer;
 import org.chromium.chrome.browser.media.MediaCaptureNotificationService;
 import org.chromium.chrome.browser.metrics.UmaSessionStats;
 import org.chromium.chrome.browser.metrics.UmaUtils;
 import org.chromium.chrome.browser.net.spdyproxy.DataReductionProxySettings;
@@ skipping 2838 matching lines @@
         int securityState = getSecurityLevel();
         enableHidingTopControls &= (securityState != ConnectionSecurityLevel.SECURITY_ERROR
                 && securityState != ConnectionSecurityLevel.SECURITY_WARNING);
 
         enableHidingTopControls &=
                 !AccessibilityUtil.isAccessibilityEnabled(getApplicationContext());
         enableHidingTopControls &= !mContentViewCore.isFocusedNodeEditable();
         enableHidingTopControls &= !mIsShowingErrorPage;
         enableHidingTopControls &= !webContents.isShowingInterstitialPage();
         enableHidingTopControls &= (mFullscreenManager != null);
+        enableHidingTopControls &= DeviceClassManager.enableFullscreen();
 
         return enableHidingTopControls;
     }
 
     /**
      * Performs any subclass-specific tasks when the Tab crashes.
      */
     private void handleTabCrash() {
         if (mTabUma != null) mTabUma.onRendererCrashed();
 
@@ skipping 381 matching lines @@
     private native void nativeAttachOverlayContentViewCore(long nativeTabAndroid,
             ContentViewCore content, boolean visible);
     private native void nativeDetachOverlayContentViewCore(long nativeTabAndroid,
             ContentViewCore content);
     private native boolean nativeHasPrerenderedUrl(long nativeTabAndroid, String url);
     private native void nativeOnRendererUnresponsive(long nativeTabAndroid);
     private native void nativeOnRendererResponsive(long nativeTabAndroid);
 
     private static native void nativeRecordStartupToCommitUma();
 }