Centralize TextStream functions to remove RenderTreeAsText dependency of the filters

Source/platform/text/TextStream.h

 /*
  * Copyright (C) 2004, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef TextStream_h
 #define TextStream_h
 
 #include "platform/PlatformExport.h"
 #include "wtf/Forward.h"
+#include "wtf/Vector.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/unicode/Unicode.h"
 
 namespace WebCore {
 
+class IntPoint;
+class IntRect;
+class LayoutPoint;
+class FloatPoint;
+class FloatRect;
+class FloatSize;
+
 class PLATFORM_EXPORT TextStream {
 public:
     struct FormatNumberRespectingIntegers {
         FormatNumberRespectingIntegers(double number) : value(number) { }
         double value;
     };
 
     TextStream& operator<<(bool);
     TextStream& operator<<(int);
     TextStream& operator<<(unsigned);
     TextStream& operator<<(long);
     TextStream& operator<<(unsigned long);
     TextStream& operator<<(long long);
     TextStream& operator<<(unsigned long long);
     TextStream& operator<<(float);
     TextStream& operator<<(double);
     TextStream& operator<<(const char*);
     TextStream& operator<<(const void*);
     TextStream& operator<<(const String&);
     TextStream& operator<<(const FormatNumberRespectingIntegers&);
 
     String release();
 
 private:
     StringBuilder m_text;
 };
 
+PLATFORM_EXPORT TextStream& operator<<(TextStream&, const IntPoint&);
+PLATFORM_EXPORT TextStream& operator<<(TextStream&, const IntRect&);
+PLATFORM_EXPORT TextStream& operator<<(TextStream&, const FloatPoint&);
+PLATFORM_EXPORT TextStream& operator<<(TextStream&, const FloatSize&);
+PLATFORM_EXPORT TextStream& operator<<(TextStream&, const FloatRect&);
+
+PLATFORM_EXPORT void writeIndent(TextStream&, int indent);
+
+template<typename Item>
+TextStream& operator<<(TextStream& ts, const Vector<Item>& vector)
+{
+    ts << "[";
+
+    unsigned size = vector.size();
+    for (unsigned i = 0; i < size; ++i) {
+        ts << vector[i];
+        if (i < size - 1)
+            ts << ", ";
+    }
+
+    ts << "]";
+    return ts;
+}
+
 }
 
 #endif