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 #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"