MIME type predicates and case-insensitive matching.

Source/core/inspector/NetworkResourcesData.cpp

 /*
  * Copyright (C) 2011 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.
  *
@@ skipping 142 matching lines @@
 {
     ensureNoDataForRequestId(requestId);
     m_requestIdToResourceDataMap.set(requestId, new ResourceData(requestId, loaderId));
 }
 
 static PassOwnPtr<TextResourceDecoder> createOtherResourceTextDecoder(const String& mimeType, const String& textEncodingName)
 {
     OwnPtr<TextResourceDecoder> decoder;
     if (!textEncodingName.isEmpty()) {
         decoder = TextResourceDecoder::create("text/plain", textEncodingName);
-    } else {
-        String mimeTypeLower = mimeType.lower();
-        if (DOMImplementation::isXMLMIMEType(mimeTypeLower)) {
-            decoder = TextResourceDecoder::create("application/xml");
-            decoder->useLenientXMLDecoding();
-        } else if (equalIgnoringCase(mimeType, "text/html")) {
-            decoder = TextResourceDecoder::create("text/html", "UTF-8");
-        } else if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeTypeLower) || DOMImplementation::isJSONMIMEType(mimeTypeLower)) {
-            decoder = TextResourceDecoder::create("text/plain", "UTF-8");
-        } else if (DOMImplementation::isTextMIMEType(mimeTypeLower)) {
-            decoder = TextResourceDecoder::create("text/plain", "ISO-8859-1");
-        }
+    } else if (DOMImplementation::isXMLMIMEType(mimeType)) {
+        decoder = TextResourceDecoder::create("application/xml");
+        decoder->useLenientXMLDecoding();
+    } else if (equalIgnoringCase(mimeType, "text/html")) {
+        decoder = TextResourceDecoder::create("text/html", "UTF-8");
+    } else if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType) || DOMImplementation::isJSONMIMEType(mimeType)) {
+        decoder = TextResourceDecoder::create("text/plain", "UTF-8");
+    } else if (DOMImplementation::isTextMIMEType(mimeType)) {
+        decoder = TextResourceDecoder::create("text/plain", "ISO-8859-1");
     }
     return decoder.release();
 }
 
 void NetworkResourcesData::responseReceived(const String& requestId, const String& frameId, const ResourceResponse& response)
 {
     ResourceData* resourceData = resourceDataForRequestId(requestId);
     if (!resourceData)
         return;
     resourceData->setFrameId(frameId);
@@ skipping 210 matching lines @@
         String requestId = m_requestIdsDeque.takeFirst();
         ResourceData* resourceData = resourceDataForRequestId(requestId);
         if (resourceData)
             m_contentSize -= resourceData->evictContent();
     }
     return true;
 }
 
 } // namespace WebCore