Use std::string instead of WTF::String / TextStream

cc/CCRenderSurface.h

Index: cc/CCRenderSurface.h
diff --git a/cc/CCRenderSurface.h b/cc/CCRenderSurface.h
index 4c82198888ce5d9524bf8699f90872b4755e5d9c..cbd90cb71082f606d379d7f4ee05b47e7bc81a7d 100644
--- a/cc/CCRenderSurface.h
+++ b/cc/CCRenderSurface.h
@@ -13,8 +13,8 @@
 #include "FloatRect.h"
 #include "IntRect.h"
 #include <public/WebTransformationMatrix.h>
+#include <string>
 #include <wtf/Noncopyable.h>
-#include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
@@ -22,7 +22,6 @@ class CCDamageTracker;
 class CCQuadSink;
 class CCRenderPassSink;
 class CCLayerImpl;
-class TextStream;
 
 struct CCAppendQuadsData;
 
@@ -32,8 +31,8 @@ public:
     explicit CCRenderSurface(CCLayerImpl*);
     virtual ~CCRenderSurface();
 
-    String name() const;
-    void dumpSurface(TextStream&, int indent) const;
+    std::string name() const;
+    void dumpSurface(std::string*, int indent) const;
 
     FloatPoint contentRectCenter() const { return FloatRect(m_contentRect).center(); }