Generate a series of nested switch statements to parse CSSPrimitiveValue units.

third_party/WebKit/Source/core/BUILD.gn

Index: third_party/WebKit/Source/core/BUILD.gn
diff --git a/third_party/WebKit/Source/core/BUILD.gn b/third_party/WebKit/Source/core/BUILD.gn
index 3ece896d5b1d88ae5190130c2cd272fcad8d4532..150c566b22a6c58ddbf0ad05d318ee616f4912fa 100644
--- a/third_party/WebKit/Source/core/BUILD.gn
+++ b/third_party/WebKit/Source/core/BUILD.gn
@@ -352,6 +352,7 @@ source_set("core_generated") {
     "$blink_core_output_dir/CSSValueKeywords.cpp",
 
     # Additional .cpp files from make_core_generated actions.
+    "$blink_core_output_dir/CSSPrimitiveValueUnitTrie.cpp",
     "$blink_core_output_dir/Event.cpp",
     "$blink_core_output_dir/EventHeaders.h",
     "$blink_core_output_dir/EventNames.cpp",
@@ -565,6 +566,7 @@ action("generated_testing_idls_internal_runtime_flags") {
 group("make_core_generated") {
   public_deps = [
     ":make_core_generated_bison",
+    ":make_core_generated_css_primitive_value_unit_trie",
     ":make_core_generated_css_property_metadata",
     ":make_core_generated_css_property_names",
     ":make_core_generated_css_tokenizer_codepoints",
@@ -970,6 +972,30 @@ action("make_core_generated_css_tokenizer_codepoints") {
   deps = make_core_generated_deps
 }
 
+# "CSSPrimitiveValueUnitTrie" in make_core_generated from GYP.
+action("make_core_generated_css_primitive_value_unit_trie") {
+  visibility = []  # Allow re-assignment of list.
+  visibility = [ ":make_core_generated" ]
+  script = "../build/scripts/make_css_primitive_value_unit_trie.py"
+
+  input_file = "css/CSSPrimitiveValueUnits.in"
+  inputs = make_trie_helpers_files + [
+             input_file,
+             "../build/scripts/templates/CSSPrimitiveValueUnitTrie.cpp.tmpl",
+           ]
+  outputs = [
+    "$blink_core_output_dir/CSSPrimitiveValueUnitTrie.cpp",
+  ]
+
+  args = [
+    rebase_path(input_file, root_build_dir),
+    "--output_dir",
+    rel_blink_core_gen_dir,
+  ]
+
+  deps = make_core_generated_deps
+}
+
 # "HTMLElementLookupTrie" in make_core_generated from GYP.
 action("make_core_generated_html_element_lookup_trie") {
   visibility = []  # Allow re-assignment of list.
@@ -977,7 +1003,7 @@ action("make_core_generated_html_element_lookup_trie") {
   script = "../build/scripts/make_element_lookup_trie.py"
 
   input_file = "html/HTMLTagNames.in"
-  inputs = scripts_for_in_files + [
+  inputs = make_trie_helpers_files + [
              input_file,
              "../build/scripts/templates/ElementLookupTrie.cpp.tmpl",
              "../build/scripts/templates/ElementLookupTrie.h.tmpl",