[Android] Reland "Provide unhandled tap event notifications"

content/browser/android/content_view_core_impl.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/browser/android/content_view_core_impl.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 581 matching lines @@
       break;
     case WebInputEvent::GestureScrollEnd:
       Java_ContentViewCore_onScrollEndEventAck(env, j_obj.obj());
       break;
     case WebInputEvent::GesturePinchBegin:
       Java_ContentViewCore_onPinchBeginEventAck(env, j_obj.obj());
       break;
     case WebInputEvent::GesturePinchEnd:
       Java_ContentViewCore_onPinchEndEventAck(env, j_obj.obj());
       break;
+    case WebInputEvent::GestureTap:
+      if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED) {
+        Java_ContentViewCore_onTapEventNotConsumed(
+            env, j_obj.obj(), event.x * dpi_scale(), event.y * dpi_scale());
+      }
+      break;
     case WebInputEvent::GestureDoubleTap:
       Java_ContentViewCore_onDoubleTapEventAck(env, j_obj.obj());
       break;
     default:
       break;
   }
 }
 
 bool ContentViewCoreImpl::FilterInputEvent(const blink::WebInputEvent& event) {
   if (event.type != WebInputEvent::GestureTap &&
@@ skipping 1132 matching lines @@
       reinterpret_cast<ui::ViewAndroid*>(view_android),
       reinterpret_cast<ui::WindowAndroid*>(window_android));
   return reinterpret_cast<intptr_t>(view);
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content