Remove template parameter on ComputedStyleBase.

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 363b23fb5fd913f4c5029298aab14275e0df2c29..8007f3dba5b41bfe7496fe0d67df42c62b30585b 100644
--- a/third_party/WebKit/Source/core/BUILD.gn
+++ b/third_party/WebKit/Source/core/BUILD.gn
@@ -424,10 +424,12 @@ css_properties("make_core_generated_computed_style_base") {
     "../build/scripts/templates/fields/storage_only.tmpl",
     "../build/scripts/templates/fields/external.tmpl",
     "../build/scripts/templates/ComputedStyleBase.h.tmpl",
+    "../build/scripts/templates/ComputedStyleBase.cpp.tmpl",
     "../build/scripts/templates/ComputedStyleBaseConstants.h.tmpl",
   ]
   outputs = [
     "$blink_core_output_dir/ComputedStyleBase.h",
+    "$blink_core_output_dir/ComputedStyleBase.cpp",
     "$blink_core_output_dir/ComputedStyleBaseConstants.h",
   ]
 }