[Android History] Add basic tablet support

chrome/android/java/src/org/chromium/chrome/browser/history/HistoryManagerUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/history/HistoryManagerUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/history/HistoryManagerUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/history/HistoryManagerUtils.java
index 906c445203c26bfe40752dfe61d63e364eb942e7..2e61b311a65eb855f504e59668367a9cc8f6799c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/history/HistoryManagerUtils.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/history/HistoryManagerUtils.java
@@ -5,12 +5,18 @@
 package org.chromium.chrome.browser.history;
 
 import android.app.Activity;
+import android.content.Context;
 import android.content.Intent;
 import android.text.TextUtils;
 
 import org.chromium.base.CommandLine;
+import org.chromium.base.ContextUtils;
 import org.chromium.chrome.browser.IntentHandler;
+import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.components.variations.VariationsAssociatedData;
+import org.chromium.content_public.browser.LoadUrlParams;
+import org.chromium.ui.base.DeviceFormFactor;
 
 /**
  * Utility methods for the browsing history manager.
@@ -43,15 +49,20 @@ public class HistoryManagerUtils {
     /**
     * @return Whether the Android-specific browsing history UI is was shown.
     */
-    public static boolean showHistoryManager(Activity activity) {
+    public static boolean showHistoryManager(Activity activity, Tab tab) {
         if (!isAndroidHistoryManagerEnabled()) return false;
 
-        // TODO(twellington): Add support for tablets
-        Intent intent = new Intent();
-        intent.setClass(activity.getApplicationContext(), HistoryActivity.class);
-        intent.putExtra(IntentHandler.EXTRA_PARENT_COMPONENT, activity.getComponentName());
-        activity.startActivity(intent);
-
+        Context appContext = ContextUtils.getApplicationContext();
+        if (DeviceFormFactor.isTablet(appContext)) {
+            // History shows up as a tab on tablets.
+            LoadUrlParams params = new LoadUrlParams(UrlConstants.NATIVE_HISTORY_URL);
+            tab.loadUrl(params);
+        } else {
+            Intent intent = new Intent();
+            intent.setClass(appContext, HistoryActivity.class);
+            intent.putExtra(IntentHandler.EXTRA_PARENT_COMPONENT, activity.getComponentName());
+            activity.startActivity(intent);
+        }
         return true;
     }
 }