Support dragging texts out of webview/Chrome.

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index b3bbe94d5620a07de286dbb360696bb5a4bd656a..5f3a0054abac453ef5fc1160b8a6c94699bc4ba1 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -1541,7 +1541,11 @@ void ContentViewCoreImpl::OnDragEvent(
     case JNI_DragEvent::ACTION_DRAG_EXITED:
       wcva->OnDragExited();
       break;
-    default:  // STARTED and ENDED. Nothing meaningful to do.
+    case JNI_DragEvent::ACTION_DRAG_ENDED:
+      wcva->OnDragEnded();
+      break;
+    case JNI_DragEvent::ACTION_DRAG_STARTED:
+      // Nothing meaningful to do.
       break;
   }
 }
@@ -1573,6 +1577,15 @@ void ContentViewCoreImpl::OnShowUnhandledTapUIIfNeeded(int x_dip, int y_dip) {
       static_cast<jint>(y_dip * dpi_scale()));
 }
 
+void ContentViewCoreImpl::HidePopupsAndPreserveSelection() {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+
+  Java_ContentViewCore_hidePopupsAndPreserveSelection(env, obj.obj());
+}
+
 void ContentViewCoreImpl::OnSmartClipDataExtracted(
     const base::string16& text,
     const base::string16& html,