Apply snake_case to generated CSSOMKeywords.cpp and CSSOMTypes.cpp.

According to existing data members and a script name, 'CSSOMFoo' should
be converted to 'cssom_foo', not 'css_om_foo'.

This CL has no behavior changes.

Bug: 770603
Change-Id: Iec7bfac69600c0f5f962cfa089c7bf07b8c16d73
Reviewed-on: https://chromium-review.googlesource.com/963159Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543310}

third_party/WebKit/Source/build/scripts/core/css/make_cssom_types.py

@@ -15,7 +15,7 @@ import template_expander
 
 class CSSOMTypesWriter(json5_generator.Writer):
     """
-    Generates CSSOMTypes.cpp and CSSOMKeywords.cpp. These classes provide
+    Generates cssom_types.cc and cssom_keywords.cc. These classes provide
     utility methods for determining whether a given CSSStyleValue is valid
     for a given CSS property. The header files live in core/css/cssom.
     """
@@ -38,18 +38,18 @@ class CSSOMTypesWriter(json5_generator.Writer):
                 enum_for_css_keyword, property_['keywords'])
 
         self._outputs = {
-            'CSSOMTypes.cpp': self.generate_types,
-            'CSSOMKeywords.cpp': self.generate_keywords,
+            'cssom_types.cc': self.generate_types,
+            'cssom_keywords.cc': self.generate_keywords,
         }
 
-    @template_expander.use_jinja('core/css/templates/CSSOMTypes.cpp.tmpl')
+    @template_expander.use_jinja('core/css/templates/cssom_types.cc.tmpl')
     def generate_types(self):
         return {
             'input_files': self._input_files,
             'properties': self._properties,
         }
 
-    @template_expander.use_jinja('core/css/templates/CSSOMKeywords.cpp.tmpl')
+    @template_expander.use_jinja('core/css/templates/cssom_keywords.cc.tmpl')
     def generate_keywords(self):
         return {
             'input_files': self._input_files,

third_party/WebKit/Source/core/BUILD.gn

@@ -1163,12 +1163,12 @@ css_properties("make_core_generated_style_builder") {
 css_properties("make_core_generated_cssom_types") {
   script = "../build/scripts/core/css/make_cssom_types.py"
   other_inputs = [
-    "../build/scripts/core/css/templates/CSSOMKeywords.cpp.tmpl",
-    "../build/scripts/core/css/templates/CSSOMTypes.cpp.tmpl",
+    "../build/scripts/core/css/templates/cssom_keywords.cc.tmpl",
+    "../build/scripts/core/css/templates/cssom_types.cc.tmpl",
   ]
   outputs = [
-    "$blink_core_output_dir/CSSOMKeywords.cpp",
-    "$blink_core_output_dir/CSSOMTypes.cpp",
+    "$blink_core_output_dir/cssom_keywords.cc",
+    "$blink_core_output_dir/cssom_types.cc",
   ]
 }