Implement rotate*() methods in DOMMatrix.

Source/core/dom/DOMMatrix.cpp

Index: Source/core/dom/DOMMatrix.cpp
diff --git a/Source/core/dom/DOMMatrix.cpp b/Source/core/dom/DOMMatrix.cpp
index 75cefcb63fe9bf945653424bb609bba356e300b0..37e100e5402f5222c39ce4115ef9276a3191f937 100644
--- a/Source/core/dom/DOMMatrix.cpp
+++ b/Source/core/dom/DOMMatrix.cpp
@@ -80,4 +80,37 @@ DOMMatrix* DOMMatrix::scaleNonUniformSelf(double sx, double sy, double sz,
     return this;
 }
 
+DOMMatrix* DOMMatrix::rotateSelf(double angle, double ox, double oy)
+{
+    bool hasTranslation = (ox || oy);
+
+    if (hasTranslation)
+        translateSelf(ox, oy);
+
+    m_matrix.rotate(angle);
+
+    if (hasTranslation)
+        translateSelf(-ox, -oy);
+
+    return this;
+}
+
+DOMMatrix* DOMMatrix::rotateFromVectorSelf(double x, double y)
+{
+    m_matrix.rotateFromVector(x, y);
+
+    return this;
+}
+
+DOMMatrix* DOMMatrix::rotateAxisAngleSelf(
+    double x, double y, double z, double angle)
+{
+    if (x != 0 || y != 0)

[zino, 2014/08/17 15:32:50]

http://dev.w3.org/fxtf/geometry/#dom-dommatrix-rotateaxisangleself

The spec says that..
"If z is not 0, set is2D of the current matrix to false."

I'm not sure but it seems to be incorrect.
rotateAxisAngle(0, 0, 1, angle) is the same with rotate(angle).
So, I think the spec should be fixed.
"If x is not 0 or y is not 0, set is2D of the current matrix to false."

What do you think?

+        m_is2D = false;
+
+    m_matrix.rotate3d(x, y, z, angle);
+
+    return this;
+}
+
 } // namespace blink