Add full support for filesystem URLs.

chrome/browser/net/url_fixer_upper.cc

Index: chrome/browser/net/url_fixer_upper.cc
diff --git a/chrome/browser/net/url_fixer_upper.cc b/chrome/browser/net/url_fixer_upper.cc
index 2e025fcd6ee3b5452d684a482a18c6fc602cb50e..f295fd639016b5296766849ca2293e219268d80b 100644
--- a/chrome/browser/net/url_fixer_upper.cc
+++ b/chrome/browser/net/url_fixer_upper.cc
@@ -412,6 +412,13 @@ std::string URLFixerUpper::SegmentURL(const std::string& text,
            url_parse::Component(0, static_cast<int>(scheme.length())))))
     return scheme;
 
+  if (scheme == chrome::kFileSystemScheme) {
+    // Have the GURL parser do the heavy lifting for us.
+    url_parse::ParseFileSystemURL(text.data(),
+        static_cast<int>(text.length()), parts);
+    return scheme;
+  }
+
   if (parts->scheme.is_valid()) {
     // Have the GURL parser do the heavy lifting for us.
     url_parse::ParseStandardURL(text.data(), static_cast<int>(text.length()),
@@ -478,6 +485,13 @@ GURL URLFixerUpper::FixupURL(const std::string& text,
   if (scheme == chrome::kFileScheme)
     return GURL(parts.scheme.is_valid() ? text : FixupPath(text));
 
+  // We handle the filesystem scheme separately.
+  if (scheme == chrome::kFileSystemScheme) {
+    if (parts.inner_parsed() && parts.inner_parsed()->scheme.is_valid())
+      return GURL(text);
+    return GURL();
+  }
+
   // Parse and rebuild about: and chrome: URLs, except about:blank.
   bool chrome_url = !LowerCaseEqualsASCII(trimmed, chrome::kAboutBlankURL) &&
       ((scheme == chrome::kAboutScheme) || (scheme == chrome::kChromeUIScheme));