Add full support for filesystem URLs.

chrome/common/extensions/extension.cc

Index: chrome/common/extensions/extension.cc
diff --git a/chrome/common/extensions/extension.cc b/chrome/common/extensions/extension.cc
index ecf3d16338a5097749b3e7315a3a747e7167ba4a..d6b52f7a1f4ddfa0183bf86d24dff185b2217d69 100644
--- a/chrome/common/extensions/extension.cc
+++ b/chrome/common/extensions/extension.cc
@@ -2477,16 +2477,27 @@ FileBrowserHandler* Extension::LoadFileBrowserHandler(
         return NULL;
       }
       StringToLowerASCII(&filter);
-      URLPattern pattern(URLPattern::SCHEME_FILESYSTEM);
+      if (!StartsWithASCII(filter,
+                           std::string(chrome::kFileSystemScheme) + ':',
+                           true)) {
+        *error = ExtensionErrorUtils::FormatErrorMessageUTF16(
+            errors::kInvalidURLPatternError, filter);
+        return NULL;
+      }
+      // The user inputs filesystem:*; we don't actually implement scheme
+      // wildcards in URLPattern, so transform to what will match correctly.
+      filter.replace(0, 11, "chrome-extension://*/");
+      URLPattern pattern(URLPattern::SCHEME_EXTENSION);
+      pattern.set_partial_filesystem_support_hack(true);
       if (pattern.Parse(filter) != URLPattern::PARSE_SUCCESS) {
         *error = ExtensionErrorUtils::FormatErrorMessageUTF16(
             errors::kInvalidURLPatternError, filter);
         return NULL;
       }
       std::string path = pattern.path();
-      bool allowed = path == "*" || path == "*.*" ||
-          (path.compare(0, 2, "*.") == 0 &&
-           path.find_first_of('*', 2) == std::string::npos);
+      bool allowed = path == "/*" || path == "/*.*" ||
+          (path.compare(0, 3, "/*.") == 0 &&
+           path.find_first_of('*', 3) == std::string::npos);
       if (!allowed) {
         *error = ExtensionErrorUtils::FormatErrorMessageUTF16(
             errors::kInvalidURLPatternError, filter);