Disable pinch-to-zoom gesture on virtual keyboard

ui/keyboard/keyboard_event_filter_unittest.cc

+// Copyright 2017 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 "ui/keyboard/keyboard_event_filter.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/events/event.h"
+
+namespace keyboard {
+
+TEST(KeyboardEventFilterTest, FilterGestureEvents) {
+  KeyboardEventFilter filter;
+  ui::GestureEvent pinch_begin(
+      15, 15, 0, base::TimeTicks(),
+      ui::GestureEventDetails(ui::ET_GESTURE_PINCH_BEGIN));
+  ui::GestureEvent pinch_update(
+      20, 20, 0, base::TimeTicks(),
+      ui::GestureEventDetails(ui::ET_GESTURE_PINCH_UPDATE));
+  ui::GestureEvent pinch_end(30, 30, 0, base::TimeTicks(),
+                             ui::GestureEventDetails(ui::ET_GESTURE_PINCH_END));
+  filter.OnGestureEvent(&pinch_begin);
+  filter.OnGestureEvent(&pinch_update);
+  filter.OnGestureEvent(&pinch_end);
+
+  EXPECT_TRUE(pinch_begin.stopped_propagation());
+  EXPECT_TRUE(pinch_update.stopped_propagation());
+  EXPECT_TRUE(pinch_end.stopped_propagation());
+
+  ui::GestureEvent tap(15, 15, 0, base::TimeTicks(),
+                       ui::GestureEventDetails(ui::ET_GESTURE_TAP));
+  filter.OnGestureEvent(&tap);
+  EXPECT_FALSE(tap.stopped_propagation());
+}
+
+}  // namespace keybaord