Add SVG as a picture supported mime type

Source/platform/MIMETypeRegistry.cpp

Index: Source/platform/MIMETypeRegistry.cpp
diff --git a/Source/platform/MIMETypeRegistry.cpp b/Source/platform/MIMETypeRegistry.cpp
index 6ad609978febb98058722f9176e141e8a4ee549b..d43a1ffbcd54555a6b74c0299f375bd51442312e 100644
--- a/Source/platform/MIMETypeRegistry.cpp
+++ b/Source/platform/MIMETypeRegistry.cpp
@@ -78,6 +78,12 @@ bool MIMETypeRegistry::isSupportedImageResourceMIMEType(const String& mimeType)
     return isSupportedImageMIMEType(mimeType);
 }
 
+bool MIMETypeRegistry::isSupportedImagePrefixedMIMEType(const String& mimeType)
+{
+    return blink::Platform::current()->mimeRegistry()->supportsImagePrefixedMIMEType(mimeType.lower())
+        != blink::WebMimeRegistry::IsNotSupported;
+}
+
 bool MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(const String& mimeType)
 {
     if (equalIgnoringCase(mimeType, "image/jpeg") || equalIgnoringCase(mimeType, "image/png"))