Add isLayoutRtl() to ApiCompatibilityUtils.java.

base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java

Index: base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java
diff --git a/base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java b/base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java
index 0116c9b381cba496940ab283e7743d25a25c9136..f29666582235ebfdec77701c492313f1143e65c3 100644
--- a/base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java
+++ b/base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java
@@ -20,6 +20,20 @@ public class ApiCompatibilityUtils {
     }
 
     /**
+     * Returns true if view's layout direction is right-to-left.
+     *
+     * @param view the View whose layout is being considered
+     */
+    public static boolean isLayoutRtl(View view) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            return view.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
+        } else {
+            // All layouts are LTR before JB MR1.
+            return false;
+        }
+    }
+
+    /**
      * @see android.view.View#setLayoutDirection(int)
      */
     public static void setLayoutDirection(View view, int layoutDirection) {