[Android] Eliminate JNI hop for critical path gestures

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 601 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::GestureDoubleTap:
+      Java_ContentViewCore_onDoubleTapEventAck(env, j_obj.obj());
+      break;
     default:
       break;
   }
 }
 
 bool ContentViewCoreImpl::FilterInputEvent(const blink::WebInputEvent& event) {
-  if (!WebInputEvent::isGestureEventType(event.type))
+  if (event.type != WebInputEvent::GestureTap &&
+      event.type != WebInputEvent::GestureDoubleTap &&
+      event.type != WebInputEvent::GestureLongTap &&
+      event.type != WebInputEvent::GestureLongPress)
     return false;
 
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env);
   if (j_obj.is_null())
     return false;
 
   const blink::WebGestureEvent& gesture =
       static_cast<const blink::WebGestureEvent&>(event);
   int gesture_type = ToContentViewGestureHandlerType(event.type);
-  return Java_ContentViewCore_filterGestureEvent(env,
-                                                 j_obj.obj(),
-                                                 gesture_type,
-                                                 gesture.x,
-                                                 gesture.y);
+  return Java_ContentViewCore_filterTapOrPressEvent(env,
+                                                    j_obj.obj(),
+                                                    gesture_type,
+                                                    gesture.x,
+                                                    gesture.y);
 }
 
 bool ContentViewCoreImpl::HasFocus() {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return false;
   return Java_ContentViewCore_hasFocus(env, obj.obj());
 }
 
@@ skipping 1212 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