Use ExtractDrivePath(path()) instead of virtual_path() for getting Drive path.

chrome/browser/chromeos/drive/drive_file_system_util_unittest.cc

Index: chrome/browser/chromeos/drive/drive_file_system_util_unittest.cc
diff --git a/chrome/browser/chromeos/drive/drive_file_system_util_unittest.cc b/chrome/browser/chromeos/drive/drive_file_system_util_unittest.cc
index 70ba8e5fd874f8d2fcd55a908de0ac2d5e0b3911..0a90b7c6277a08ba33613fe084db784c14356289 100644
--- a/chrome/browser/chromeos/drive/drive_file_system_util_unittest.cc
+++ b/chrome/browser/chromeos/drive/drive_file_system_util_unittest.cc
@@ -76,6 +76,28 @@ TEST(DriveFileSystemUtilTest, ExtractDrivePath) {
                 "/special/drive/subdir/foo.txt")));
 }
 
+TEST(DriveFileSystemUtilTest, ExtractDrivePathFromFileSystemUrl) {
+  const GURL dummy_origin("chrome-extension://extension-id");
+  EXPECT_EQ(base::FilePath::FromUTF8Unsafe("drive/foo/bar"),
+            ExtractDrivePathFromFileSystemUrl(
+                fileapi::FileSystemURL::CreateForTest(
+                    dummy_origin,
+                    fileapi::kFileSystemTypeDrive,
+                    base::FilePath::FromUTF8Unsafe("/special/drive/foo/bar"))));
+  EXPECT_EQ(base::FilePath(),
+            ExtractDrivePathFromFileSystemUrl(
+                fileapi::FileSystemURL::CreateForTest(
+                    dummy_origin,
+                    fileapi::kFileSystemTypeDrive,
+                    base::FilePath::FromUTF8Unsafe("/special/drivex/foo"))));
+  EXPECT_EQ(base::FilePath(),

[hashimoto, 2013/04/08 03:51:00]

How about testing a case where |virtual_path| is different from |path|, if it's
not difficult?

[kinaba, 2013/04/08 05:47:50]

Done. I hope the things became clearer.

+            ExtractDrivePathFromFileSystemUrl(
+                fileapi::FileSystemURL::CreateForTest(
+                    dummy_origin,
+                    fileapi::kFileSystemTypeNativeLocal,
+                    base::FilePath::FromUTF8Unsafe("/Downloads/foo.txt"))));
+}
+
 TEST(DriveFileSystemUtilTest, EscapeUnescapeCacheFileName) {
   const std::string kUnescapedFileName(
       "tmp:`~!@#$%^&*()-_=+[{|]}\\\\;\',<.>/?");