Android-side of insertion/selection handles visibility.

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

Index: content/public/android/java/src/org/chromium/content/browser/input/HandleView.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/HandleView.java b/content/public/android/java/src/org/chromium/content/browser/input/HandleView.java
index e41efcfdfd053684238c41ed651870883aadae57..b8bac44a4cad98f35f370f71bcbee6c61e357fa3 100644
--- a/content/public/android/java/src/org/chromium/content/browser/input/HandleView.java
+++ b/content/public/android/java/src/org/chromium/content/browser/input/HandleView.java
@@ -18,6 +18,8 @@ import android.view.ViewParent;
 import android.view.animation.AnimationUtils;
 import android.widget.PopupWindow;
 
+import com.google.common.annotations.VisibleForTesting;
+
 import org.chromium.content.browser.PositionObserver;
 
 /**
@@ -230,7 +232,8 @@ public class HandleView extends View {
         return mContainer.isShowing();
     }
 
-    private boolean isPositionVisible() {
+    @VisibleForTesting
+    boolean isPositionVisible() {
         // Always show a dragging handle.
         if (mIsDragging) {
             return true;
@@ -250,8 +253,17 @@ public class HandleView extends View {
         final int posX = getContainerPositionX() + (int) mHotspotX;
         final int posY = getContainerPositionY() + (int) mHotspotY;
 
-        return posX >= clip.left && posX <= clip.right &&
+        boolean result = posX >= clip.left && posX <= clip.right &&
                 posY >= clip.top && posY <= clip.bottom;
+
+        final Rect clippingRect = mController.getVisibleClippingRectangle();
+        if (result && clippingRect != null) {
+            // We need to clip against the visible areas as supplied by Blink,
+            // e.g. textaread and text input elements.
+            return clippingRect.contains(getAdjustedPositionX(), getAdjustedPositionY());
+        }
+
+        return result;
     }
 
     // x and y are in physical pixels.