cc: Add point-based UV coordinate on TextureLayer

cc/texture_layer.h

Index: cc/texture_layer.h
diff --git a/cc/texture_layer.h b/cc/texture_layer.h
index 4fea928d964eaf449eb6f552336df6e6fa48a216..d96e7a43fe3efa3f92d1da62227e03b1a88b340e 100644
--- a/cc/texture_layer.h
+++ b/cc/texture_layer.h
@@ -39,8 +39,8 @@ public:
     // Sets whether this texture should be Y-flipped at draw time. Defaults to true.
     void setFlipped(bool);
 
-    // Sets a UV transform to be used at draw time. Defaults to (0, 0, 1, 1).
-    void setUVRect(const gfx::RectF&);
+    // Sets a UV transform to be used at draw time. Defaults to (0, 0) and (1, 1).
+    void setUV(const gfx::PointF& topLeft, const gfx::PointF& bottomRight);
 
     // Sets an opacity value per vertex. It will be multiplied by the layer opacity value.
     void setVertexOpacity(float bottomLeft, float topLeft, float topRight, float bottomRight);
@@ -79,7 +79,8 @@ private:
     MailboxCallback m_mailboxReleaseCallback;
 
     bool m_flipped;
-    gfx::RectF m_uvRect;
+    gfx::PointF m_uvTopLeft;
+    gfx::PointF m_uvBottomRight;
     // [bottom left, top left, top right, bottom right]
     float m_vertexOpacity[4];
     bool m_premultipliedAlpha;