[WIP] make GURL::path() return a StringPiece

storage/common/fileapi/file_system_util.cc

Index: storage/common/fileapi/file_system_util.cc
diff --git a/storage/common/fileapi/file_system_util.cc b/storage/common/fileapi/file_system_util.cc
index 1116fcd563118eaf1b97315c2cd83d5bd964f8a6..16d6acaa674498854006d100c6ec94ca755e3e6b 100644
--- a/storage/common/fileapi/file_system_util.cc
+++ b/storage/common/fileapi/file_system_util.cc
@@ -172,7 +172,7 @@ bool ParseFileSystemSchemeURL(const GURL& url,
 
   // A path of the inner_url contains only mount type part (e.g. "/temporary").
   DCHECK(url.inner_url());
-  std::string inner_path = url.inner_url()->path();
+  base::StringPiece inner_path = url.inner_url()->path();
   for (size_t i = 0; i < arraysize(kValidTypes); ++i) {
     if (inner_path == kValidTypes[i].dir) {
       file_system_type = kValidTypes[i].type;
@@ -183,10 +183,11 @@ bool ParseFileSystemSchemeURL(const GURL& url,
   if (file_system_type == kFileSystemTypeUnknown)
     return false;
 
-  std::string path = net::UnescapeURLComponent(url.path(),
+  std::string path = net::UnescapeURLComponent(
+      url.path().as_string(),
       net::UnescapeRule::SPACES | net::UnescapeRule::PATH_SEPARATORS |
-      net::UnescapeRule::URL_SPECIAL_CHARS_EXCEPT_PATH_SEPARATORS |
-      net::UnescapeRule::SPOOFING_AND_CONTROL_CHARS);
+          net::UnescapeRule::URL_SPECIAL_CHARS_EXCEPT_PATH_SEPARATORS |
+          net::UnescapeRule::SPOOFING_AND_CONTROL_CHARS);
 
   // Ensure the path is relative.
   while (!path.empty() && path[0] == '/')