Migrate more functions from MathUtil to gfx::Transform

cc/video_layer_impl.cc

Index: cc/video_layer_impl.cc
diff --git a/cc/video_layer_impl.cc b/cc/video_layer_impl.cc
index 05eea675b785f8b58ce7de6e388041fcf08dc7cb..f3717010ee38792f0cdd526a81b5ad92ced59fbe 100644
--- a/cc/video_layer_impl.cc
+++ b/cc/video_layer_impl.cc
@@ -17,6 +17,7 @@
 #include "media/filters/skcanvas_video_renderer.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
+#include "ui/gfx/transform_util.h"
 
 namespace cc {
 
@@ -32,7 +33,7 @@ VideoLayerImpl::VideoLayerImpl(LayerTreeImpl* treeImpl, int id, WebKit::WebVideo
     , m_externalTextureResource(0)
 {
     // This matrix is the default transformation for stream textures, and flips on the Y axis.
-    m_streamTextureMatrix = MathUtil::createGfxTransform(
+    m_streamTextureMatrix = gfx::CreateGfxTransform(
         1, 0, 0, 0,
         0, -1, 0, 0,
         0, 0, 1, 0,
@@ -405,7 +406,7 @@ void VideoLayerImpl::didReceiveFrame()
 
 void VideoLayerImpl::didUpdateMatrix(const float matrix[16])
 {
-    m_streamTextureMatrix = MathUtil::createGfxTransform(
+    m_streamTextureMatrix = gfx::CreateGfxTransform(
         matrix[0], matrix[1], matrix[2], matrix[3],
         matrix[4], matrix[5], matrix[6], matrix[7],
         matrix[8], matrix[9], matrix[10], matrix[11],