Add new SkPoint3 class

samplecode/SampleLighting.cpp

Index: samplecode/SampleLighting.cpp
diff --git a/samplecode/SampleLighting.cpp b/samplecode/SampleLighting.cpp
index 40e6fbb073bb1075f2d9402a9cb97273a8c56c92..a002a9320f9843762dae1a492ad84a391ab10d31 100755
--- a/samplecode/SampleLighting.cpp
+++ b/samplecode/SampleLighting.cpp
@@ -11,6 +11,7 @@
 #include "SkCanvas.h"
 #include "SkErrorInternals.h"
 #include "SkGr.h"
+#include "SkPoint3.h"
 #include "SkReadBuffer.h"
 #include "SkShader.h"
 #include "SkWriteBuffer.h"
@@ -21,18 +22,6 @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
-struct SkVector3 {
-    SkScalar fX, fY, fZ;
-
-    bool operator==(const SkVector3& other) const {
-        return fX == other.fX && fY == other.fY && fZ == other.fZ;
-    }
-
-    bool operator!=(const SkVector3& other) const {
-        return !(*this == other);
-    }
-};
-
 class LightingShader : public SkShader {
 public:
     struct Light {