Auto merge of #18495 - nnethercote:derive-PropertyDeclaration, r=jdm

Measure PropertyDeclaration more thoroughly.

This patch replaces the handwritten MallocSizeOf implementation for
PropertyDeclaration with a derived one, which gives much more thorough
measurement.

This requires (a) deriving MallocSizeOf for a *lot* of additional types (most
of which already have `derive(HeapSizeOf)` in Servo builds), and (b)
implementing MallocSizeOf for a few more types in the `malloc_size_of` crate.

These changes would significantly improve the reporting coverage for gmail if
it weren't for the fact that SpecifiedUrl isn't measured due to a lack of
clarity about its fields; that can be fixed as a follow-up once bug 1397971 has
landed.

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

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- [ ] There are tests for these changes OR
- [X] These changes do not require tests because testing is on the Gecko side.

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components/style/values/computed/angle.rs

@@ -14,6 +14,7 @@ use values::distance::{ComputeSquaredDistance, SquaredDistance};
 
 /// A computed angle.
 #[animate(fallback = "Self::animate_fallback")]
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf, Deserialize, Serialize))]
 #[derive(Animate, Clone, Copy, Debug, PartialEq)]
 #[derive(PartialOrd, ToAnimatedZero)]

components/style/values/computed/color.rs

@@ -15,10 +15,12 @@ use values::animated::color::{Color as AnimatedColor, RGBA as AnimatedRGBA};
 /// Conceptually, the formula is "color * (1 - p) + currentcolor * p"
 /// where p is foreground_ratio.
 #[derive(Clone, Copy, Debug)]
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
 pub struct Color {
     /// RGBA color.
     pub color: RGBA,
+
     /// The ratio of currentcolor in complex color.
     pub foreground_ratio: u8,
 }

components/style/values/computed/image.rs

@@ -50,6 +50,7 @@ pub type GradientKind = GenericGradientKind<
 
 /// A computed gradient line direction.
 #[derive(Clone, Copy, Debug, PartialEq)]
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
 pub enum LineDirection {
     /// An angle.

components/style/values/computed/length.rs

@@ -66,6 +66,7 @@ impl ToComputedValue for specified::Length {
 }
 
 #[allow(missing_docs)]
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
 #[derive(Clone, Copy, Debug, PartialEq, ToAnimatedZero)]
 pub struct CalcLengthOrPercentage {
@@ -293,6 +294,7 @@ impl ToComputedValue for specified::CalcLengthOrPercentage {
 
 #[allow(missing_docs)]
 #[animate(fallback = "Self::animate_fallback")]
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
 #[css(derive_debug)]
 #[derive(Animate, Clone, ComputeSquaredDistance, Copy, PartialEq)]
@@ -450,6 +452,7 @@ impl ToComputedValue for specified::LengthOrPercentage {
 
 #[allow(missing_docs)]
 #[animate(fallback = "Self::animate_fallback")]
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
 #[css(derive_debug)]
 #[derive(Animate, Clone, ComputeSquaredDistance, Copy, PartialEq, ToCss)]
@@ -681,6 +684,7 @@ impl NonNegativeLengthOrPercentage {
 }
 
 /// The computed `<length>` value.
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(Deserialize, HeapSizeOf, Serialize))]
 #[derive(Animate, Clone, ComputeSquaredDistance, Copy, Debug, PartialEq, PartialOrd)]
 #[derive(ToAnimatedValue, ToAnimatedZero)]

components/style/values/computed/mod.rs

@@ -383,6 +383,7 @@ impl From<GreaterThanOrEqualToOneNumber> for CSSFloat {
 }
 
 #[allow(missing_docs)]
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
 #[derive(Clone, ComputeSquaredDistance, Copy, Debug, PartialEq, ToCss)]
 pub enum NumberOrPercentage {

components/style/values/computed/percentage.rs

@@ -9,6 +9,7 @@ use style_traits::ToCss;
 use values::{CSSFloat, serialize_percentage};
 
 /// A computed percentage.
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(Deserialize, HeapSizeOf, Serialize))]
 #[derive(Animate, Clone, ComputeSquaredDistance, Copy, Debug, Default)]
 #[derive(PartialEq, PartialOrd, ToAnimatedZero)]

components/style/values/computed/time.rs

@@ -10,6 +10,7 @@ use values::CSSFloat;
 
 /// A computed `<time>` value.
 #[derive(Clone, Copy, Debug, PartialEq, PartialOrd)]
+#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf, Deserialize, Serialize))]
 pub struct Time {
     seconds: CSSFloat,