MIME type predicates and case-insensitive matching.

Source/core/inspector/InspectorPageAgent.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 148 matching lines @@
 static bool hasTextContent(Resource* cachedResource)
 {
     InspectorPageAgent::ResourceType type = InspectorPageAgent::cachedResourceType(*cachedResource);
     return type == InspectorPageAgent::DocumentResource || type == InspectorPageAgent::StylesheetResource || type == InspectorPageAgent::ScriptResource || type == InspectorPageAgent::XHRResource;
 }
 
 static PassOwnPtr<TextResourceDecoder> createXHRTextDecoder(const String& mimeType, const String& textEncodingName)
 {
     if (!textEncodingName.isEmpty())
         return TextResourceDecoder::create("text/plain", textEncodingName);
-    if (DOMImplementation::isXMLMIMEType(mimeType.lower())) {
+    if (DOMImplementation::isXMLMIMEType(mimeType)) {
         OwnPtr<TextResourceDecoder> decoder = TextResourceDecoder::create("application/xml");
         decoder->useLenientXMLDecoding();
         return decoder.release();
     }
     if (equalIgnoringCase(mimeType, "text/html"))
         return TextResourceDecoder::create("text/html", "UTF-8");
     return TextResourceDecoder::create("text/plain", "UTF-8");
 }
 
 bool InspectorPageAgent::cachedResourceContent(Resource* cachedResource, String* result, bool* base64Encoded)
@@ skipping 1091 matching lines @@
 }
 
 void InspectorPageAgent::setShowViewportSizeOnResize(ErrorString*, bool show, const bool* showGrid)
 {
     m_state->setBoolean(PageAgentState::showSizeOnResize, show);
     m_state->setBoolean(PageAgentState::showGridOnResize, showGrid && *showGrid);
 }
 
 } // namespace WebCore