Make net::DataURL's MIME string check stricter

content/child/web_url_loader_impl.h

Index: content/child/web_url_loader_impl.h
diff --git a/content/child/web_url_loader_impl.h b/content/child/web_url_loader_impl.h
index 3ac22a3015791edc6f3447af0796c90a60627849..b58aa375a8e3dc4c0452347ff5bc48d6ff7be0c9 100644
--- a/content/child/web_url_loader_impl.h
+++ b/content/child/web_url_loader_impl.h
@@ -5,16 +5,26 @@
 #ifndef CONTENT_CHILD_WEB_URL_LOADER_IMPL_H_
 #define CONTENT_CHILD_WEB_URL_LOADER_IMPL_H_
 
+#include <string>
+
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebURLLoader.h"
 
+class GURL;
+
 namespace webkit_glue {
 struct ResourceResponseInfo;
 }
 
 namespace content {
 
+// Extracts the information from a data scheme URL. Exported only for testing.
+CONTENT_EXPORT bool GetInfoFromDataURL(const GURL& url,
+                                       webkit_glue::ResourceResponseInfo* info,
+                                       std::string* data,
+                                       int* error_code);
+
 class WebURLLoaderImpl : public blink::WebURLLoader {
  public:
   WebURLLoaderImpl();