Adding Blink-side 3d Box and Bounds calculations to TransformOperations

Source/platform/transforms/TransformationMatrix.cpp

Index: Source/platform/transforms/TransformationMatrix.cpp
diff --git a/Source/platform/transforms/TransformationMatrix.cpp b/Source/platform/transforms/TransformationMatrix.cpp
index ba4713bc4ee7020daab6c6d4f5a2c11e059dc7e7..4bb51c7c052f59e5949c61449d01050484e93291 100644
--- a/Source/platform/transforms/TransformationMatrix.cpp
+++ b/Source/platform/transforms/TransformationMatrix.cpp
@@ -28,6 +28,7 @@
 #include "config.h"
 #include "platform/transforms/TransformationMatrix.h"
 
+#include "platform/geometry/FloatBox.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/IntRect.h"
@@ -646,6 +647,27 @@ LayoutRect TransformationMatrix::clampedBoundsOfProjectedQuad(const FloatQuad& q
     return LayoutRect(LayoutUnit::clamp(left), LayoutUnit::clamp(top),  LayoutUnit::clamp(right - left), LayoutUnit::clamp(bottom - top));
 }
 
+void TransformationMatrix::transformBox(FloatBox& box) const
+{
+    FloatBox bounds;
+    bool firstPoint = true;
+    for (int corner = 0; corner < 8; ++corner) {
+        FloatPoint3D point(box.x(), box.y(), box.z());
+        point += FloatPoint3D(corner & 1? box.width() : 0,

[Ian Vollick, 2014/06/16 15:23:38]

Same comment about this little snippet.

[awoloszyn, 2014/06/17 14:26:01]

Done.

+            corner & 2? box.height() : 0,
+            corner & 4? box.depth() : 0);
+        point = mapPoint(point);
+        if (firstPoint) {
+            bounds.setOrigin(point);
+            firstPoint = false;
+        } else {
+            bounds.expandTo(point);
+        }
+    }
+    box = bounds;
+}
+
+
 FloatPoint TransformationMatrix::mapPoint(const FloatPoint& p) const
 {
     if (isIdentityOrTranslation())