Bump rayon to 0.8.

MozReview-Commit-ID: 8OFE5PghMzl

components/layout/Cargo.toml

@@ -29,7 +29,7 @@ ordered-float = "0.4"
 parking_lot = "0.3.3"
 profile_traits = {path = "../profile_traits"}
 range = {path = "../range"}
-rayon = "0.7.1"
+rayon = "0.8"
 script_layout_interface = {path = "../script_layout_interface"}
 script_traits = {path = "../script_traits"}
 selectors = { path = "../selectors" }

components/layout_thread/Cargo.toml

@@ -25,7 +25,7 @@ msg = {path = "../msg"}
 net_traits = {path = "../net_traits"}
 parking_lot = {version = "0.3.3", features = ["nightly"]}
 profile_traits = {path = "../profile_traits"}
-rayon = "0.7.1"
+rayon = "0.8"
 script = {path = "../script"}
 script_layout_interface = {path = "../script_layout_interface"}
 script_traits = {path = "../script_traits"}

components/style/Cargo.toml

@@ -16,7 +16,7 @@ path = "lib.rs"
 doctest = false
 
 [features]
-gecko = ["nsstring_vendor", "rayon/unstable", "num_cpus", "style_traits/gecko"]
+gecko = ["nsstring_vendor", "num_cpus", "style_traits/gecko"]
 use_bindgen = ["bindgen", "regex", "toml"]
 servo = ["serde", "serde_derive", "heapsize", "heapsize_derive",
          "style_traits/servo", "servo_atoms", "servo_config", "html5ever",
@@ -25,7 +25,7 @@ servo = ["serde", "serde_derive", "heapsize", "heapsize_derive",
          # FIXME: Uncomment when https://github.com/servo/servo/pull/16953 has landed:
          #"arrayvec/use_union"
 
-         "rayon/unstable", "servo_url"]
+         "servo_url"]
 testing = []
 gecko_debug = ["nsstring_vendor/gecko_debug"]
 
@@ -57,7 +57,7 @@ ordered-float = "0.4"
 parking_lot = "0.3.3"
 pdqsort = "0.1.0"
 precomputed-hash = "0.1"
-rayon = "0.7.1"
+rayon = "0.8"
 selectors = { path = "../selectors" }
 serde = {version = "0.9", optional = true}
 serde_derive = {version = "0.9", optional = true}

tests/unit/style/Cargo.toml

@@ -19,7 +19,7 @@ cssparser = "0.14.0"
 euclid = "0.14.4"
 html5ever = "0.17"
 parking_lot = "0.3"
-rayon = "0.7"
+rayon = "0.8"
 rustc-serialize = "0.3"
 selectors = {path = "../../../components/selectors"}
 servo_atoms = {path = "../../../components/atoms"}