Convert the coordinates in WebInputEvent To Viewport in InputRouter

content/browser/renderer_host/input/web_input_event_util_unittest.cc

 // Copyright 2014 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.
 
 // Needed on Windows to get |M_PI| from <cmath>.
 #ifdef _WIN32
 #define _USE_MATH_DEFINES
 #endif
 
 #include <cmath>
 
 #include "content/browser/renderer_host/input/web_input_event_util.h"
+#include "content/common/input/synthetic_web_input_event_builders.h"
 #include "content/common/input/web_input_event_traits.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/events/blink/blink_event_util.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/gesture_detection/gesture_event_data.h"
 #include "ui/events/gesture_detection/motion_event_generic.h"
 #include "ui/events/gesture_event_details.h"
 #include "ui/gfx/geometry/safe_integer_conversions.h"
 
 using blink::WebInputEvent;
@@ skipping 92 matching lines @@
   EXPECT_EQ(gfx::ToFlooredInt(pos.x()), web_event.x);
   EXPECT_EQ(gfx::ToFlooredInt(pos.y()), web_event.y);
   EXPECT_EQ(gfx::ToFlooredInt(raw_pos.x()), web_event.globalX);
   EXPECT_EQ(gfx::ToFlooredInt(raw_pos.y()), web_event.globalY);
   EXPECT_EQ(blink::WebGestureDeviceTouchscreen, web_event.sourceDevice);
   EXPECT_EQ(delta.x(), web_event.data.scrollUpdate.deltaX);
   EXPECT_EQ(delta.y(), web_event.data.scrollUpdate.deltaY);
   EXPECT_TRUE(web_event.data.scrollUpdate.previousUpdateInSequencePrevented);
 }
 
+TEST(WebInputEventUtilTest, NoScalingWith1DSF) {
+  auto event =
+      SyntheticWebMouseEventBuilder::Build(blink::WebInputEvent::MouseMove,
+                                           10, 10, 0);
+  EXPECT_FALSE(ConvertWebInputEventToViewport(event, 1.f));
+  EXPECT_TRUE(ConvertWebInputEventToViewport(event, 2.f));
+}
+
 }  // namespace content