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

chrome/browser/extensions/chrome_content_browser_client_extensions_part.cc

Index: chrome/browser/extensions/chrome_content_browser_client_extensions_part.cc
diff --git a/chrome/browser/extensions/chrome_content_browser_client_extensions_part.cc b/chrome/browser/extensions/chrome_content_browser_client_extensions_part.cc
index e192ef01251f3407f0f3897a8cdbe1d22b34b17d..c2a435ca3e9227487dc5cb991e144ed744590dec 100644
--- a/chrome/browser/extensions/chrome_content_browser_client_extensions_part.cc
+++ b/chrome/browser/extensions/chrome_content_browser_client_extensions_part.cc
@@ -251,7 +251,7 @@ GURL ChromeContentBrowserClientExtensionsPart::GetEffectiveURL(
 
   // If the URL is part of an extension's web extent, convert it to an
   // extension URL.
-  return extension->GetResourceURL(url.path());
+  return extension->GetResourceURL(url.path().as_string());
 }
 
 // static
@@ -576,8 +576,8 @@ bool ChromeContentBrowserClientExtensionsPart::ShouldAllowOpenURL(
     return true;
   }
 
-  if (WebAccessibleResourcesInfo::IsResourceWebAccessible(to_extension,
-                                                          to_url.path())) {
+  if (WebAccessibleResourcesInfo::IsResourceWebAccessible(
+          to_extension, to_url.path().as_string())) {
     *result = true;
     return true;
   }