[Typed OM] Add CSSValue -> CSSNumberValue conversion

third_party/WebKit/Source/build/scripts/templates/CSSOMTypes.cpp.tmpl

Index: third_party/WebKit/Source/build/scripts/templates/CSSOMTypes.cpp.tmpl
diff --git a/third_party/WebKit/Source/build/scripts/templates/CSSOMTypes.cpp.tmpl b/third_party/WebKit/Source/build/scripts/templates/CSSOMTypes.cpp.tmpl
index 33b93b0688df90827abc2fb1fed72fcc57280e95..e97ab2b721683f1727fed19e50e423e9a8abddc0 100644
--- a/third_party/WebKit/Source/build/scripts/templates/CSSOMTypes.cpp.tmpl
+++ b/third_party/WebKit/Source/build/scripts/templates/CSSOMTypes.cpp.tmpl
@@ -9,28 +9,53 @@
 #include "core/css/cssom/CSSKeywordValue.h"
 #include "core/css/cssom/CSSLengthValue.h"
 #include "core/css/cssom/CSSStyleValue.h"
+#include "core/css/cssom/CSSNumberValue.h"
 
 namespace blink {
 
+namespace {
+
+bool validNumberValue(CSSPropertyID id, double number) {
+  bool integerOnly;
+  bool negativeAllowed;
+  switch (id) {
+  {% for property_id, property in properties.items() if property.number_metadata %}
+  case {{property_id}}:
+    integerOnly = {{ property.number_metadata.integer }};
+    negativeAllowed = {{ property.number_metadata.allow_negative }};
+    break;
+  {% endfor %}
+  default:
+      return false;
+  }
+  if (!negativeAllowed && number < 0)
+      return false;
+  if (integerOnly && std::floor(std::abs(number)) != std::abs(number))
+      return false;
+  return true;
+}
+
+} // namespace
+
 bool CSSOMTypes::propertyCanTake(CSSPropertyID id,
                                  const CSSStyleValue& styleValue) {
-  // Shortcut special case.
-  if (styleValue.type() == CSSStyleValue::SimpleLengthType ||
-      styleValue.type() == CSSStyleValue::CalcLengthType) {
-    if (toCSSLengthValue(styleValue).containsPercent() &&
-        !CSSPropertyMetadata::propertySupportsPercentage(id)) {
+  if (styleValue.type() == CSSStyleValue::KeywordType) {
+    // Keywords are handled differently.
+    return CSSOMKeywords::validKeywordForProperty(id, toCSSKeywordValue(styleValue));
+  } else if (styleValue.type() == CSSStyleValue::SimpleLengthType
+             || styleValue.type() == CSSStyleValue::CalcLengthType) {
+    if (toCSSLengthValue(styleValue).containsPercent()
+        && !CSSPropertyMetadata::propertySupportsPercentage(id)) {
       return false;
     }
-  } else if (styleValue.type() == CSSStyleValue::KeywordType) {
-    // Keywords are also handled differently.
-    return CSSOMKeywords::validKeywordForProperty(
-        id, toCSSKeywordValue(styleValue));
+  } else if (styleValue.type() == CSSStyleValue::NumberType) {
+    return validNumberValue(id, toCSSNumberValue(styleValue).value());
   } else if (styleValue.type() == CSSStyleValue::Unknown) {
     // The check happens later in this case.
     return true;
   }
 
-  return CSSOMTypes::propertyCanTakeType(id, styleValue.type());
+  return propertyCanTakeType(id, styleValue.type());
 }
 
 bool CSSOMTypes::propertyCanTakeType(CSSPropertyID id,