Fixed "blocking io" from FixupPath on UI thread.

components/url_fixer/url_fixer.cc

Index: components/url_fixer/url_fixer.cc
diff --git a/components/url_fixer/url_fixer.cc b/components/url_fixer/url_fixer.cc
index f10958a1122402b5d862c23e7e37d85baa6aeae2..bbab87f5e03489f1ab24a9add4a315700034547c 100644
--- a/components/url_fixer/url_fixer.cc
+++ b/components/url_fixer/url_fixer.cc
@@ -178,7 +178,7 @@ std::string FixupPath(const std::string& text) {
 #endif
 
   // Here, we know the input looks like a file.
-  GURL file_url = net::FilePathToFileURL(base::FilePath(filename));
+  GURL file_url = net::FilePathToFileURLNoCWD(base::FilePath(filename));

[davidben, 2015/04/14 16:26:22]

This is a loss of functionality for this function. Did you verify that no caller
of this function ever needs relative paths?

   if (file_url.is_valid()) {
     return base::UTF16ToUTF8(net::FormatUrl(file_url,
                                             std::string(),