Add Browser Actions tab model selector and open a tab through it if ChromeTabbedActivity is not ava…

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java
index f40cc273a8973026586536fd723f530139b0f67e..2774b19205e415cdc2677ff1144521b4f9aeb8bf 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModel.java
@@ -61,12 +61,17 @@ public interface TabModel extends TabList {
         FROM_LAUNCHER_SHORTCUT,
 
         /**
-         * The tab is initially detached.
+         * The tab is initially detached from CCT.
          */
-        FROM_DETACHED,
+        FROM_DETACHED_SPECULATE,
 
         /** Opened in the background from Browser Actions context menu. */
         FROM_BROWSER_ACTIONS,
+
+        /**
+         * The tab is initially detached explicitly by users.
+         */
+        FROM_DETACHED_USER_ACTION,

[Yusuf, 2017/07/18 22:59:47]

how is this different from the new launch type we added above for browser
actions? Is it a difference of detached_browser_action and
frozen_browser_actions? I wonder how relevant those will be in things that use
TabLaunchType.

Can we not just use FROM_DETACHED and FROM_RESTORE? Or can we not get away with
adding only one new FROM_BROWSER_ACTIONS?

[ltian, 2017/08/07 23:24:12]

Revert it back since new design creates all tabs in lazy load mode and does not
use Tab.createDetached().

     }
 
     /**