Fix msan failure on WebPointerProperties.

third_party/WebKit/public/platform/WebPointerProperties.h

Index: third_party/WebKit/public/platform/WebPointerProperties.h
diff --git a/third_party/WebKit/public/platform/WebPointerProperties.h b/third_party/WebKit/public/platform/WebPointerProperties.h
index ad2704ae526e8ecf5eb670d1aa0ef4e7cabbd00d..c9fa68a2d9088895ff43be15e262712c9fda3b43 100644
--- a/third_party/WebKit/public/platform/WebPointerProperties.h
+++ b/third_party/WebKit/public/platform/WebPointerProperties.h
@@ -46,7 +46,9 @@ class WebPointerProperties {
         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),
@@ -56,7 +58,9 @@ class WebPointerProperties {
         tangentialPressure(0.0f),
         twist(0),
         button(buttonParam),
-        pointerType(pointerTypeParam) {}
+        pointerType(pointerTypeParam),
+        movementX(0),
+        movementY(0) {}
 
   int id;