Fix msan failure on WebPointerProperties.

third_party/WebKit/public/platform/WebPointerProperties.h

 // Copyright (c) 2015 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.
 
 #ifndef WebPointerProperties_h
 #define WebPointerProperties_h
 
 #include <cstdint>
 #include <limits>
 
@@ skipping 28 matching lines @@
   };
 
   WebPointerProperties()
       : id(0),
         force(std::numeric_limits<float>::quiet_NaN()),
         tiltX(0),
         tiltY(0),
         tangentialPressure(0.0f),
         twist(0),
         button(Button::NoButton),
-        pointerType(PointerType::Unknown) {}
+        pointerType(PointerType::Unknown),
+        movementX(0),
+        movementY(0) {}
 
   WebPointerProperties(Button buttonParam, PointerType pointerTypeParam)
       : id(0),
         force(std::numeric_limits<float>::quiet_NaN()),
         tiltX(0),
         tiltY(0),
         tangentialPressure(0.0f),
         twist(0),
         button(buttonParam),
-        pointerType(pointerTypeParam) {}
+        pointerType(pointerTypeParam),
+        movementX(0),
+        movementY(0) {}
 
   int id;
 
   // The valid range is [0,1], with NaN meaning pressure is not supported by
   // the input device.
   float force;
 
   // Tilt of a pen stylus from surface normal as plane angles in degrees,
   // Values lie in [-90,90]. A positive tiltX is to the right and a positive
   // tiltY is towards the user.
@@ skipping 19 matching lines @@
 
   PointerType pointerType;
 
   int movementX;
   int movementY;
 };
 
 }  // namespace blink
 
 #endif