Miscellaneous cleanup to reduce number of includes in platform/graphics/

Source/core/platform/graphics/IntPoint.h

Index: Source/core/platform/graphics/IntPoint.h
diff --git a/Source/core/platform/graphics/IntPoint.h b/Source/core/platform/graphics/IntPoint.h
index d230aa6f82761cd37e5fc4c4bda9228e775ac062..bb7c4e25eb3eb35426260efecd75916bec8c920d 100644
--- a/Source/core/platform/graphics/IntPoint.h
+++ b/Source/core/platform/graphics/IntPoint.h
@@ -28,7 +28,6 @@
 #define IntPoint_h
 
 #include "core/platform/graphics/IntSize.h"
-#include "wtf/MathExtras.h"
 #include "wtf/Platform.h"
 
 #if OS(DARWIN)
@@ -59,12 +58,8 @@ public:
     void move(const IntSize& s) { move(s.width(), s.height()); } 
     void moveBy(const IntPoint& offset) { move(offset.x(), offset.y()); }
     void move(int dx, int dy) { m_x += dx; m_y += dy; }
-    void scale(float sx, float sy)
-    {
-        m_x = lroundf(static_cast<float>(m_x * sx));
-        m_y = lroundf(static_cast<float>(m_y * sy));
-    }
-    
+    void scale(float sx, float sy);
+
     IntPoint expandedTo(const IntPoint& other) const
     {
         return IntPoint(m_x > other.m_x ? m_x : other.m_x,