Make a function to query whether a CSSPropertyID is valid and whether it has a name.

third_party/WebKit/Source/build/scripts/make_css_property_names.py

Index: third_party/WebKit/Source/build/scripts/make_css_property_names.py
diff --git a/third_party/WebKit/Source/build/scripts/make_css_property_names.py b/third_party/WebKit/Source/build/scripts/make_css_property_names.py
index e32dc5f682ec57857b5377e715ae9de30937f352..56de4cba828929334f7493d375353b839d0ced9e 100755
--- a/third_party/WebKit/Source/build/scripts/make_css_property_names.py
+++ b/third_party/WebKit/Source/build/scripts/make_css_property_names.py
@@ -44,9 +44,19 @@ const WTF::AtomicString& getPropertyNameAtomicString(CSSPropertyID);
 WTF::String getPropertyNameString(CSSPropertyID);
 WTF::String getJSPropertyName(CSSPropertyID);
 
+inline bool isPropertyIDWithName(int id)

[rune, 2016/09/30 09:48:33]

Should the name here also include "CSS"? isCSSPropertyIDWithName?

[meade_UTC10, 2016/10/06 04:42:05]

Done.

+{
+    return id >= firstCSSProperty && id <= lastUnresolvedCSSProperty;
+}
+
+inline bool isValidCSSPropertyID(CSSPropertyID id)
+{
+    return id != CSSPropertyInvalid;
+}
+
 inline CSSPropertyID convertToCSSPropertyID(int value)
 {
-    ASSERT(value >= CSSPropertyInvalid && value <= lastCSSProperty);
+    DCHECK(value >= CSSPropertyInvalid && value <= lastCSSProperty);
     return static_cast<CSSPropertyID>(value);
 }
 
@@ -118,14 +128,14 @@ const Property* findProperty(register const char* str, register unsigned int len
 
 const char* getPropertyName(CSSPropertyID id)
 {
-    ASSERT(id >= firstCSSProperty && id <= lastUnresolvedCSSProperty);
+    DCHECK(isPropertyIDWithName(id));
     int index = id - firstCSSProperty;
     return propertyNameStringsPool + propertyNameStringsOffsets[index];
 }
 
 const AtomicString& getPropertyNameAtomicString(CSSPropertyID id)
 {
-    ASSERT(id >= firstCSSProperty && id <= lastUnresolvedCSSProperty);
+    DCHECK(isPropertyIDWithName(id));
     int index = id - firstCSSProperty;
     static AtomicString* propertyStrings = new AtomicString[lastUnresolvedCSSProperty]; // Intentionally never destroyed.
     AtomicString& propertyString = propertyStrings[index];