Even more explicit LayoutUnit conversion

third_party/WebKit/Source/core/page/SpatialNavigation.cpp

Index: third_party/WebKit/Source/core/page/SpatialNavigation.cpp
diff --git a/third_party/WebKit/Source/core/page/SpatialNavigation.cpp b/third_party/WebKit/Source/core/page/SpatialNavigation.cpp
index df0e6c6aa9e35d501e0979a3786bc4ef4929e14c..6cc510d9af8d2c8c20f728dad25b667f4030259b 100644
--- a/third_party/WebKit/Source/core/page/SpatialNavigation.cpp
+++ b/third_party/WebKit/Source/core/page/SpatialNavigation.cpp
@@ -194,8 +194,8 @@ bool scrollInDirection(LocalFrame* frame, WebFocusType type)
     ASSERT(frame);
 
     if (frame && canScrollInDirection(frame->document(), type)) {
-        LayoutUnit dx = 0;
-        LayoutUnit dy = 0;
+        LayoutUnit dx;
+        LayoutUnit dy;
         switch (type) {
         case WebFocusTypeLeft:
             dx = - ScrollableArea::pixelsPerLineStep();
@@ -230,8 +230,8 @@ bool scrollInDirection(Node* container, WebFocusType type)
         return false;
 
     if (canScrollInDirection(container, type)) {
-        LayoutUnit dx = 0;
-        LayoutUnit dy = 0;
+        LayoutUnit dx;
+        LayoutUnit dy;
         switch (type) {
         case WebFocusTypeLeft:
             dx = - std::min<LayoutUnit>(ScrollableArea::pixelsPerLineStep(), container->layoutBox()->scrollLeft());