Support for Adaptive Handle Orientation

content/public/android/java/src/org/chromium/content/browser/input/HandleViewResources.java

Index: content/public/android/java/src/org/chromium/content/browser/input/HandleViewResources.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/HandleViewResources.java b/content/public/android/java/src/org/chromium/content/browser/input/HandleViewResources.java
index 841a7081d434cd7e43f15b6ee46bd613b2a1b6c7..39dbf46776d30e887ed0bcd091a8af153dfc76a1 100644
--- a/content/public/android/java/src/org/chromium/content/browser/input/HandleViewResources.java
+++ b/content/public/android/java/src/org/chromium/content/browser/input/HandleViewResources.java
@@ -11,6 +11,7 @@ import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.drawable.Drawable;
+import android.graphics.drawable.LayerDrawable;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
@@ -32,19 +33,19 @@ public class HandleViewResources {
         android.R.attr.textSelectHandleRight,
     };
 
-    public static Drawable getLeftHandleDrawable(Context context) {
-        return getHandleDrawable(context, LEFT_HANDLE_ATTRS);
+    public static Drawable getLeftHandleDrawable(Context context, boolean invert) {
+        return getHandleDrawable(context, LEFT_HANDLE_ATTRS, invert);
     }
 
-    public static Drawable getCenterHandleDrawable(Context context) {
-        return getHandleDrawable(context, CENTER_HANDLE_ATTRS);
+    public static Drawable getCenterHandleDrawable(Context context, boolean invert) {
+        return getHandleDrawable(context, CENTER_HANDLE_ATTRS, invert);
     }
 
-    public static Drawable getRightHandleDrawable(Context context) {
-        return getHandleDrawable(context, RIGHT_HANDLE_ATTRS);
+    public static Drawable getRightHandleDrawable(Context context, boolean invert) {
+        return getHandleDrawable(context, RIGHT_HANDLE_ATTRS, invert);
     }
 
-    private static Drawable getHandleDrawable(Context context, final int[] attrs) {
+    private static Drawable getHandleDrawable(Context context, final int[] attrs, boolean invert) {
         TypedArray a = context.getTheme().obtainStyledAttributes(attrs);
         Drawable drawable = a.getDrawable(0);
         if (drawable == null) {
@@ -57,7 +58,22 @@ public class HandleViewResources {
             }
         }
         a.recycle();
-        return drawable;
+        if (!invert) return drawable;
+        return invertDrawable(drawable, 180);
+    }
+
+    static Drawable invertDrawable(final Drawable drawable, final int angle) {
+        final Drawable[] drawableArray = {drawable};
+        return new LayerDrawable(drawableArray) {
+            @Override
+            public void draw(final Canvas canvas) {
+                canvas.save();
+                canvas.rotate(
+                        angle, drawable.getBounds().width() / 2, drawable.getBounds().height() / 2);
+                super.draw(canvas);
+                canvas.restore();
+            }
+        };
     }
 
     private static Bitmap getHandleBitmap(Context context, final int[] attrs) {
@@ -81,7 +97,7 @@ public class HandleViewResources {
             if (bitmap != null) return bitmap;
         }
 
-        Drawable drawable = getHandleDrawable(context, attrs);
+        Drawable drawable = getHandleDrawable(context, attrs, false);
         assert drawable != null;
 
         final int width = drawable.getIntrinsicWidth();