Use lambda instead of the 'CSSPropertyIDComparer' class

Source/core/css/StylePropertySet.cpp

Index: Source/core/css/StylePropertySet.cpp
diff --git a/Source/core/css/StylePropertySet.cpp b/Source/core/css/StylePropertySet.cpp
index 65c8e1f4d8c7bc7071d79c3b6d40990cd749a944..904c8159e852d4f1313e0557b4a4c0381b0b057f 100644
--- a/Source/core/css/StylePropertySet.cpp
+++ b/Source/core/css/StylePropertySet.cpp
@@ -500,31 +500,25 @@ CSSStyleDeclaration* MutableStylePropertySet::ensureCSSStyleDeclaration()
     return m_cssomWrapper.get();
 }
 
+int MutableStylePropertySet::findPropertyIndex(CSSPropertyID propertyID) const
+{
+    const CSSProperty* begin = m_propertyVector.data();
+    const CSSProperty* end = begin + m_propertyVector.size();
+    // Convert here propertyID into an uint16_t to compare it with the metadata's m_propertyID to avoid
+    // the compiler converting it to an int multiple times in the loop.
+    uint16_t id = static_cast<uint16_t>(propertyID);
 
-class CSSPropertyIDComparer {
-public:
-    explicit CSSPropertyIDComparer(CSSPropertyID propertyID)
-        : m_propertyID(static_cast<uint16_t>(propertyID)) { }
-    bool operator()(const CSSProperty& property) const
+    auto compare = [propertyID, id](const CSSProperty& property) -> bool
     {
-        if (property.metadata().m_propertyID == m_propertyID) {
+        if (property.metadata().m_propertyID == id) {
             // Only enabled properties should be part of the style.
-            ASSERT(CSSPropertyMetadata::isEnabledProperty(propertyID()));
+            ASSERT(CSSPropertyMetadata::isEnabledProperty(propertyID));
             return true;
         }
         return false;
-    }
-
-private:
-    CSSPropertyID propertyID() const { return static_cast<CSSPropertyID>(m_propertyID); }
-    uint16_t m_propertyID; // Store as uint16_t to avoid casts while comparing.
-};
+    };
 
-int MutableStylePropertySet::findPropertyIndex(CSSPropertyID propertyID) const
-{
-    const CSSProperty* begin = m_propertyVector.data();
-    const CSSProperty* end = begin + m_propertyVector.size();
-    const CSSProperty* it = std::find_if(begin, end, CSSPropertyIDComparer(propertyID));
+    const CSSProperty* it = std::find_if(begin, end, compare);
 
     return (it == end) ? -1 : it - begin;
 }