Auto merge of #7605 - nox:skew, r=mbrubeck

Implement "transform: skew()"

Thanks to @Jinwoo-Song for the original commit, which I just rebased and cleaned up. Fixes #6237.

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components/layout/Cargo.toml

@@ -76,7 +76,7 @@ libc = "0.1"
 smallvec = "0.1"
 string_cache = "0.1"
 string_cache_plugin = "0.1"
-euclid = "0.1"
+euclid = "0.2"
 serde = "0.5"
 serde_macros = "0.5"
 serde_json = "0.5"

components/layout/display_list_builder.rs

@@ -1217,8 +1217,8 @@ impl FragmentDisplayListBuilding for Fragment {
                     transform::ComputedOperation::Matrix(m) => {
                         m.to_gfx_matrix()
                     }
-                    transform::ComputedOperation::Skew(sx, sy) => {
-                        Matrix4::create_skew(sx, sy)
+                    transform::ComputedOperation::Skew(theta_x, theta_y) => {
+                        Matrix4::create_skew(theta_x.radians(), theta_y.radians())
                     }
                 };