Make empty selection behavior behave like Android EditText.

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content.browser;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
@@ skipping 1232 matching lines @@
         updateGestureStateListener(GestureEventType.PINCH_END);
     }
 
     @SuppressWarnings("unused")
     @CalledByNative
     private void onSingleTapEventAck(boolean consumed, int x, int y) {
         for (mGestureStateListenersIterator.rewind();
                 mGestureStateListenersIterator.hasNext();) {
             mGestureStateListenersIterator.next().onSingleTap(consumed, x, y);
         }
+        hidePastePopup();
     }
 
     @SuppressWarnings("unused")
     @CalledByNative
     private void onShowUnhandledTapUIIfNeeded(int x, int y) {
         if (mContextualSearchClient != null) {
             mContextualSearchClient.showUnhandledTapUIIfNeeded(x, y);
         }
     }
 
@@ skipping 971 matching lines @@
                     hidePastePopup();
                 }
                 break;
 
             case SelectionEventType.INSERTION_HANDLE_TAPPED:
                 if (mWasPastePopupShowingOnInsertionDragStart) {
                     hidePastePopup();
                 } else {
                     showPastePopup(xAnchor, yAnchor);
                 }
+                mWasPastePopupShowingOnInsertionDragStart = false;
                 break;
 
             case SelectionEventType.INSERTION_HANDLE_CLEARED:
                 hidePastePopup();
                 mHasInsertion = false;
                 mSelectionRect.setEmpty();
                 break;
 
             case SelectionEventType.INSERTION_HANDLE_DRAG_STARTED:
                 mWasPastePopupShowingOnInsertionDragStart = isPastePopupShowing();
                 hidePastePopup();
                 break;
 
             case SelectionEventType.INSERTION_HANDLE_DRAG_STOPPED:
+                if (mWasPastePopupShowingOnInsertionDragStart) {
+                    showPastePopup(xAnchor, yAnchor);
+                }
+                mWasPastePopupShowingOnInsertionDragStart = false;
+                break;
             case SelectionEventType.SELECTION_ESTABLISHED:
             case SelectionEventType.SELECTION_DISSOLVED:
                 break;
 
             default:
                 assert false : "Invalid selection event type.";
         }
         if (mContextualSearchClient != null) {
             mContextualSearchClient.onSelectionEvent(eventType, xAnchor, yAnchor);
         }
@@ skipping 1021 matching lines @@
     private native void nativeSetTextTrackSettings(long nativeContentViewCoreImpl,
             boolean textTracksEnabled, String textTrackBackgroundColor, String textTrackFontFamily,
             String textTrackFontStyle, String textTrackFontVariant, String textTrackTextColor,
             String textTrackTextShadow, String textTrackTextSize);
 
     private native void nativeExtractSmartClipData(long nativeContentViewCoreImpl,
             int x, int y, int w, int h);
 
     private native void nativeSetBackgroundOpaque(long nativeContentViewCoreImpl, boolean opaque);
 }