Auto merge of #12319 - servo:stable-geckolib, r=larsbergstrom+SimonSapin

Use a stable compiler for build-geckolib

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---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #11815 (github issue number if applicable).

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- [ ] There are tests for these changes OR
- [x] These changes do not require tests because CI already runs `./mach build-geckolib`

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Author: bors-servo

ports/geckolib/Cargo.lock

@@ -10,29 +10,12 @@ name = "geckoservo"
 path = "lib.rs"
 crate-type = ["staticlib"]
 
-[features]
-default = ["servo_features"]
-
-# Features that aren't actually required for geckolib, but match the ones used
-# in the full Servo build.  Enabling this reduces the number of things
-# recompiled when building both Servo and geckolib in the same source tree.
-servo_features = [
-  "heapsize",
-  "selectors/unstable",
-  "style/servo",
-  "time",
-  "url/query_encoding",
-  "url/rustc-serialize",
-  "uuid",
-]
-
 [dependencies]
 app_units = "0.2.5"
 cssparser = "0.5.4"
 env_logger = "0.3"
 euclid = "0.7.1"
 gecko_bindings = {version = "0.0.1", path = "gecko_bindings"}
-heapsize = {version = "0.3.0", optional = true}
 lazy_static = "0.2"
 libc = "0.2"
 log = {version = "0.3.5", features = ["release_max_level_info"]}
@@ -42,10 +25,8 @@ smallvec = "0.1"
 string_cache = {version = "0.2.20", features = ["unstable"]}
 style = {path = "../../components/style", features = ["gecko"]}
 style_traits = {path = "../../components/style_traits"}
-time = {version = "0.1", optional = true, features = ["rustc-serialize"]}
 url = "1.0.0"
 util = {path = "../../components/util"}
-uuid = {version = "0.2", optional = true, features = ["v4", "serde"]}
 
 [replace]
 "string_cache:0.2.20" = {path = "string_cache"}

ports/geckolib/Cargo.toml

@@ -8,7 +8,6 @@ extern crate cssparser;
 extern crate env_logger;
 extern crate euclid;
 extern crate gecko_bindings;
-#[cfg(feature = "servo_features")] #[macro_use] extern crate heapsize;
 #[macro_use]
 extern crate lazy_static;
 extern crate libc;

ports/geckolib/lib.rs

@@ -15,9 +15,6 @@ pub type SharedStyleContext = style::context::SharedStyleContext<GeckoSelectorIm
 pub type PrivateStyleData = style::data::PrivateStyleData<GeckoSelectorImpl, GeckoComputedValues>;
 pub type Animation = style::animation::Animation<GeckoSelectorImpl>;
 
-#[cfg(feature = "servo_features")]
-known_heap_size!(0, GeckoSelectorImpl, PseudoElement, NonTSPseudoClass);
-
 #[derive(Debug, Clone)]
 pub struct GeckoSelectorImpl;