Allow client app choose whether custom action button is tinted

chrome/android/java/src/org/chromium/chrome/browser/widget/TintedDrawable.java

Index: chrome/android/java/src/org/chromium/chrome/browser/widget/TintedDrawable.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/TintedDrawable.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/TintedDrawable.java
index 934967cb525d9d7d5d3884d40a132e358ebb1a1e..c21f09a62d0c439a7c79b6b3aa16f28c38a767b3 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/widget/TintedDrawable.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/widget/TintedDrawable.java
@@ -50,11 +50,21 @@ public class TintedDrawable extends BitmapDrawable {
         updateTintColor();
     }
 
+    /**
+     * Factory method for creating a {@link TintedDrawable} with a resource id.
+     */
     public static TintedDrawable constructTintedDrawable(Resources res, int drawableId) {
         Bitmap icon = BitmapFactory.decodeResource(res, drawableId);
         return new TintedDrawable(res, icon);
     }
 
+    /**
+     * Factory method for creating a {@link TintedDrawable} with a {@link Bitmap} icon.
+     */
+    public static TintedDrawable constructTintedDrawable(Resources res, Bitmap icon) {
+        return new TintedDrawable(res, icon);
+    }
+
     private boolean updateTintColor() {
         if (mTint == null) return false;
         setColorFilter(mTint.getColorForState(getState(), 0), PorterDuff.Mode.SRC_IN);