Make LayoutObject::showLayoutTreeForThis Windows-friendly.

third_party/WebKit/Source/core/layout/LayoutObject.h

Index: third_party/WebKit/Source/core/layout/LayoutObject.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.h b/third_party/WebKit/Source/core/layout/LayoutObject.h
index d538266bd94ed7898d2cb0069bc7f77942136a9a..dac50599dd770ddf9d7046b5d6eecbd9844981bb 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -451,10 +451,10 @@ public:
     void showLineTreeForThis() const;
 
     void showLayoutObject() const;
-    // We don't make printedCharacters an optional parameter so that
+    // We don't make stringBuilder an optional parameter so that
     // showLayoutObject can be called from gdb easily.
-    void showLayoutObject(int printedCharacters) const;
-    void showLayoutTreeAndMark(const LayoutObject* markedObject1 = nullptr, const char* markedLabel1 = nullptr, const LayoutObject* markedObject2 = nullptr, const char* markedLabel2 = nullptr, int depth = 0) const;
+    void showLayoutObject(StringBuilder&) const;
+    void showLayoutTreeAndMark(const LayoutObject* markedObject1 = nullptr, const char* markedLabel1 = nullptr, const LayoutObject* markedObject2 = nullptr, const char* markedLabel2 = nullptr, unsigned depth = 0) const;
 #endif
 
     // This function is used to create the appropriate LayoutObject based