[Downloads] Add Incognito support

chrome/android/java/src/org/chromium/chrome/browser/BasicNativePage.java

Index: chrome/android/java/src/org/chromium/chrome/browser/BasicNativePage.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/BasicNativePage.java b/chrome/android/java/src/org/chromium/chrome/browser/BasicNativePage.java
index a98797e107c5a01067d83b1bfcfdb8ec547ef168..796fc32d34a6f6dc1e71e851a9b5038cd7c5332b 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/BasicNativePage.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/BasicNativePage.java
@@ -19,8 +19,9 @@ import org.chromium.content_public.browser.LoadUrlParams;
  */
 public abstract class BasicNativePage implements NativePage {
 
+    protected final Tab mTab;
+
     private final Activity mActivity;
-    private final Tab mTab;

[Ian Wen, 2016/08/15 23:17:27]

Would you mind making a protected method getTab() instead of a protected
attribute? I feel it's much easier to read the code in child classes, if the
method is protected instead of the attribute.

[gone, 2016/08/15 23:29:49]

Switched it so that the Tab is directly passed through.

     private final int mBackgroundColor;
     private final int mThemeColor;