Make some functions that are hit during renderer startup available for inlining

src/ast/variables.h

Index: src/ast/variables.h
diff --git a/src/ast/variables.h b/src/ast/variables.h
index 786db2a07c202359cd836c1967b07ae9c99d78e6..09df57ad54e934dda38261a728254fb6f858d29a 100644
--- a/src/ast/variables.h
+++ b/src/ast/variables.h
@@ -20,7 +20,24 @@ class Variable final : public ZoneObject {
  public:
   Variable(Scope* scope, const AstRawString* name, VariableMode mode,
            VariableKind kind, InitializationFlag initialization_flag,
-           MaybeAssignedFlag maybe_assigned_flag = kNotAssigned);
+           MaybeAssignedFlag maybe_assigned_flag = kNotAssigned)
+      : scope_(scope),
+        name_(name),
+        local_if_not_shadowed_(nullptr),
+        next_(nullptr),
+        index_(-1),
+        initializer_position_(kNoSourcePosition),
+        bit_field_(MaybeAssignedFlagField::encode(maybe_assigned_flag) |
+                   InitializationFlagField::encode(initialization_flag) |
+                   VariableModeField::encode(mode) |
+                   IsUsedField::encode(false) |
+                   ForceContextAllocationField::encode(false) |
+                   ForceHoleInitializationField::encode(false) |
+                   LocationField::encode(VariableLocation::UNALLOCATED) |
+                   VariableKindField::encode(kind)) {
+    // Var declared variables never need initialization.
+    DCHECK(!(mode == VAR && initialization_flag == kNeedsInitialization));
+  }
 
   explicit Variable(Variable* other);