DevTools: [CSS] introduce strong types

Source/core/inspector/InspectorCSSAgent.cpp

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 787 matching lines @@
         for (unsigned i = 0; i < glyphBuffer.size(); ++i) {
             String familyName = glyphBuffer.fontDataAt(i)->platformData().fontFamilyName();
             if (familyName.isNull())
                 familyName = "";
             fontStats->add(familyName);
         }
     }
 }
 
 void InspectorCSSAgent::getPlatformFontsForNode(ErrorString* errorString, int nodeId,
-    String* cssFamilyName, RefPtr<TypeBuilder::Array<TypeBuilder::CSS::PlatformFontUsage> >& platformFonts)
+    RefPtr<TypeBuilder::Array<TypeBuilder::CSS::PlatformFontUsage>>& platformFonts)
 {
     Node* node = m_domAgent->assertNode(errorString, nodeId);
     if (!node)
         return;
 
-    RefPtrWillBeRawPtr<CSSComputedStyleDeclaration> computedStyleInfo = CSSComputedStyleDeclaration::create(node, true);
-    *cssFamilyName = computedStyleInfo->getPropertyValue(CSSPropertyFontFamily);
-
     HashCountedSet<String> fontStats;
     LayoutObject* root = node->layoutObject();
     if (root) {
         collectPlatformFontsForLayoutObject(root, &fontStats);
         // Iterate upto two layers deep.
         for (LayoutObject* child = root->slowFirstChild(); child; child = child->nextSibling()) {
             collectPlatformFontsForLayoutObject(child, &fontStats);
             for (LayoutObject* child2 = child->slowFirstChild(); child2; child2 = child2->nextSibling())
                 collectPlatformFontsForLayoutObject(child2, &fontStats);
         }
@@ skipping 702 matching lines @@
     visitor->trace(m_documentToCSSStyleSheets);
     visitor->trace(m_invalidatedDocuments);
     visitor->trace(m_nodeToInspectorStyleSheet);
     visitor->trace(m_documentToViaInspectorStyleSheet);
 #endif
     visitor->trace(m_inspectorUserAgentStyleSheet);
     InspectorBaseAgent::trace(visitor);
 }
 
 } // namespace blink