Support subpixel values for text-shadow and box-shadow

Source/core/rendering/InlineTextBox.cpp

Index: Source/core/rendering/InlineTextBox.cpp
diff --git a/Source/core/rendering/InlineTextBox.cpp b/Source/core/rendering/InlineTextBox.cpp
index 2bfe7de7bd567c9e49c226ef29d52ea77c0c14fd..a77eeef7ba63425bba6494658f220f6e64f5d9e3 100644
--- a/Source/core/rendering/InlineTextBox.cpp
+++ b/Source/core/rendering/InlineTextBox.cpp
@@ -1107,17 +1107,17 @@ void InlineTextBox::paintDecoration(GraphicsContext* context, const FloatPoint&
     RenderStyle* styleToUse = renderer()->style(isFirstLineStyle());
     int baseline = styleToUse->fontMetrics().ascent();
 
-    int extraOffset = 0;
+    LayoutUnit extraOffset = 0;
     if (!linesAreOpaque && shadow && shadow->next()) {
         FloatRect clipRect(localOrigin, FloatSize(width, baseline + 2));
         for (const ShadowData* s = shadow; s; s = s->next()) {
             FloatRect shadowRect(localOrigin, FloatSize(width, baseline + 2));
             shadowRect.inflate(s->blur());
-            int shadowX = isHorizontal() ? s->x() : s->y();
-            int shadowY = isHorizontal() ? s->y() : -s->x();
+            LayoutUnit shadowX = isHorizontal() ? s->x() : s->y();
+            LayoutUnit shadowY = isHorizontal() ? s->y() : -s->x();
             shadowRect.move(shadowX, shadowY);
             clipRect.unite(shadowRect);
-            extraOffset = max(extraOffset, max(0, shadowY) + s->blur());
+            extraOffset = max(extraOffset, max(LayoutUnit(0), shadowY) + s->blur());
         }
         context->clip(clipRect);
         extraOffset += baseline + 2;
@@ -1131,8 +1131,8 @@ void InlineTextBox::paintDecoration(GraphicsContext* context, const FloatPoint&
                 localOrigin.move(0, -extraOffset);
                 extraOffset = 0;
             }
-            int shadowX = isHorizontal() ? shadow->x() : shadow->y();
-            int shadowY = isHorizontal() ? shadow->y() : -shadow->x();
+            LayoutUnit shadowX = isHorizontal() ? shadow->x() : shadow->y();
+            LayoutUnit shadowY = isHorizontal() ? shadow->y() : -shadow->x();
             context->setShadow(FloatSize(shadowX, shadowY - extraOffset), shadow->blur(),
                 renderer()->resolveColor(shadow->color(), Color::stdShadowColor));
             shadow = shadow->next();