Move malloc_size_of_derive back into the Servo repo

The 'MallocSizeOf' trait is not available on crates.io, so the derive shouldn't be either.  Move this derive back into the Servo repository.

See issue servo#24419.

components/canvas_traits/Cargo.toml

@@ -19,7 +19,7 @@ euclid = "0.20"
 ipc-channel = "0.12"
 lazy_static = "1"
 malloc_size_of = { path = "../malloc_size_of" }
-malloc_size_of_derive = "0.1"
+malloc_size_of_derive = { path = "../malloc_size_of_derive" }
 pixels = {path = "../pixels"}
 serde = "1.0"
 serde_bytes = "0.10"

components/devtools_traits/Cargo.toml

@@ -15,7 +15,7 @@ bitflags = "1.0"
 http = "0.1"
 ipc-channel = "0.12"
 malloc_size_of = { path = "../malloc_size_of" }
-malloc_size_of_derive = "0.1"
+malloc_size_of_derive = { path = "../malloc_size_of_derive" }
 msg = {path = "../msg"}
 serde = "1.0"
 servo_url = {path = "../url"}

components/geometry/Cargo.toml

@@ -14,5 +14,5 @@ path = "lib.rs"
 app_units = "0.7"
 euclid = "0.20"
 malloc_size_of = { path = "../malloc_size_of" }
-malloc_size_of_derive = "0.1"
+malloc_size_of_derive = { path = "../malloc_size_of_derive" }
 webrender_api = { git = "https://github.com/servo/webrender" }

components/gfx_traits/Cargo.toml

@@ -12,6 +12,6 @@ path = "lib.rs"
 
 [dependencies]
 malloc_size_of = { path = "../malloc_size_of" }
-malloc_size_of_derive = "0.1"
+malloc_size_of_derive = { path = "../malloc_size_of_derive" }
 range = {path = "../range"}
 serde = "1.0"

components/malloc_size_of_derive/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "malloc_size_of_derive"
+version = "0.1.0"
+authors = ["The Servo Project Developers"]
+license = "MIT/Apache-2.0"
+description = "Crate for Firefox memory reporting, not intended for external use"
+publish = false
+
+[lib]
+path = "lib.rs"
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "0.4"
+syn = { version = "0.15", features = ["full"] }
+synstructure = "0.10"