Send synthetic GestureTapDown to focus BrowserPlugin

content/renderer/browser_plugin/browser_plugin.cc

 // 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.
 
 #include "content/renderer/browser_plugin/browser_plugin.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 411 matching lines @@
   DCHECK(!blink::WebInputEvent::isTouchEventType(event.type));
 
   if (event.type == blink::WebInputEvent::MouseWheel) {
     auto wheel_event = static_cast<const blink::WebMouseWheelEvent&>(event);
     if (wheel_event.resendingPluginId == browser_plugin_instance_id_)
       return blink::WebInputEventResult::NotHandled;
   }
 
   if (blink::WebInputEvent::isGestureEventType(event.type)) {
     auto gesture_event = static_cast<const blink::WebGestureEvent&>(event);
-    if (gesture_event.resendingPluginId == browser_plugin_instance_id_)
-      return blink::WebInputEventResult::NotHandled;
+    DCHECK(blink::WebInputEvent::GestureTapDown == event.type ||
+           gesture_event.resendingPluginId == browser_plugin_instance_id_);
+
+    // We shouldn't be forwarding GestureEvents to the Guest anymore. Indicate
+    // we handled this only if it's a non-resent event.
+    return gesture_event.resendingPluginId == browser_plugin_instance_id_
+               ? blink::WebInputEventResult::NotHandled
+               : blink::WebInputEventResult::HandledApplication;
   }
 
   if (event.type == blink::WebInputEvent::ContextMenu)
     return blink::WebInputEventResult::HandledSuppressed;
 
   if (blink::WebInputEvent::isKeyboardEventType(event.type) &&
       !edit_commands_.empty()) {
     BrowserPluginManager::Get()->Send(
         new BrowserPluginHostMsg_SetEditCommandsForNextKeyEvent(
             browser_plugin_instance_id_,
@@ skipping 125 matching lines @@
 
 bool BrowserPlugin::HandleMouseLockedInputEvent(
     const blink::WebMouseEvent& event) {
   BrowserPluginManager::Get()->Send(
       new BrowserPluginHostMsg_HandleInputEvent(browser_plugin_instance_id_,
                                                 &event));
   return true;
 }
 
 }  // namespace content