Accept absolute Windows paths without leading slash in GN commands

tools/gn/label_pattern_unittest.cc

Index: tools/gn/label_pattern_unittest.cc
diff --git a/tools/gn/label_pattern_unittest.cc b/tools/gn/label_pattern_unittest.cc
index 19e253027e5517cc469932a182e5d4a08357a6c5..2154af1b88a2f764239d9902fd0ac963ea7a1d11 100644
--- a/tools/gn/label_pattern_unittest.cc
+++ b/tools/gn/label_pattern_unittest.cc
@@ -28,36 +28,46 @@ TEST(LabelPattern, PatternParse) {
   SourceDir current_dir("//foo/");
   PatternCase cases[] = {
     // Missing stuff.
-    { "", false, LabelPattern::MATCH, "", "", "" },
-    { ":", false, LabelPattern::MATCH, "", "", "" },
+    {"", false, LabelPattern::MATCH, "", "", ""},
+    {":", false, LabelPattern::MATCH, "", "", ""},
     // Normal things.
-    { ":bar", true, LabelPattern::MATCH, "//foo/", "bar", "" },
-    { "//la:bar", true, LabelPattern::MATCH, "//la/", "bar", "" },
-    { "*", true, LabelPattern::RECURSIVE_DIRECTORY, "", "", "" },
-    { ":*", true, LabelPattern::DIRECTORY, "//foo/", "", "" },
-    { "la:*", true, LabelPattern::DIRECTORY, "//foo/la/", "", "" },
-    { "la/*:*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/la/", "", "" },
-    { "//la:*", true, LabelPattern::DIRECTORY, "//la/", "", "" },
-    { "./*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/", "", "" },
-    { "foo/*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/foo/", "", "" },
-    { "//l/*", true, LabelPattern::RECURSIVE_DIRECTORY, "//l/", "", "" },
+    {":bar", true, LabelPattern::MATCH, "//foo/", "bar", ""},
+    {"//la:bar", true, LabelPattern::MATCH, "//la/", "bar", ""},
+    {"*", true, LabelPattern::RECURSIVE_DIRECTORY, "", "", ""},
+    {":*", true, LabelPattern::DIRECTORY, "//foo/", "", ""},
+    {"la:*", true, LabelPattern::DIRECTORY, "//foo/la/", "", ""},
+    {"la/*:*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/la/", "", ""},
+    {"//la:*", true, LabelPattern::DIRECTORY, "//la/", "", ""},
+    {"./*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/", "", ""},
+    {"foo/*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/foo/", "", ""},
+    {"//l/*", true, LabelPattern::RECURSIVE_DIRECTORY, "//l/", "", ""},
     // Toolchains.
-    { "//foo()", true, LabelPattern::MATCH, "//foo/", "foo", "" },
-    { "//foo(//bar)", true, LabelPattern::MATCH, "//foo/", "foo", "//bar:bar" },
-    { "//foo:*(//bar)", true, LabelPattern::DIRECTORY, "//foo/", "",
-      "//bar:bar" },
-    { "//foo/*(//bar)", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/", "",
-      "//bar:bar" },
+    {"//foo()", true, LabelPattern::MATCH, "//foo/", "foo", ""},
+    {"//foo(//bar)", true, LabelPattern::MATCH, "//foo/", "foo", "//bar:bar"},
+    {"//foo:*(//bar)", true, LabelPattern::DIRECTORY, "//foo/", "",
+     "//bar:bar"},
+    {"//foo/*(//bar)", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/", "",
+     "//bar:bar"},
     // Wildcards in invalid places.
-    { "*foo*:bar", false, LabelPattern::MATCH, "", "", "" },
-    { "foo*:*bar", false, LabelPattern::MATCH, "", "", "" },
-    { "*foo:bar", false, LabelPattern::MATCH, "", "", "" },
-    { "foo:bar*", false, LabelPattern::MATCH, "", "", "" },
-    { "*:*", true, LabelPattern::RECURSIVE_DIRECTORY, "", "", "" },
+    {"*foo*:bar", false, LabelPattern::MATCH, "", "", ""},
+    {"foo*:*bar", false, LabelPattern::MATCH, "", "", ""},
+    {"*foo:bar", false, LabelPattern::MATCH, "", "", ""},
+    {"foo:bar*", false, LabelPattern::MATCH, "", "", ""},
+    {"*:*", true, LabelPattern::RECURSIVE_DIRECTORY, "", "", ""},
     // Invalid toolchain stuff.
-    { "//foo(//foo/bar:*)", false, LabelPattern::MATCH, "", "", "" },
-    { "//foo/*(*)", false, LabelPattern::MATCH, "", "", "" },
-    { "//foo(//bar", false, LabelPattern::MATCH, "", "", "" },
+    {"//foo(//foo/bar:*)", false, LabelPattern::MATCH, "", "", ""},
+    {"//foo/*(*)", false, LabelPattern::MATCH, "", "", ""},
+    {"//foo(//bar", false, LabelPattern::MATCH, "", "", ""},
+    // Absolute paths.
+    {"/la/*", true, LabelPattern::RECURSIVE_DIRECTORY, "/la/", "", ""},
+    {"/la:bar", true, LabelPattern::MATCH, "/la/", "bar", ""},
+#if defined(OS_WIN)
+    {"/C:/la/*", true, LabelPattern::RECURSIVE_DIRECTORY, "/C:/la/", "", ""},
+    {"C:/la/*", true, LabelPattern::RECURSIVE_DIRECTORY, "/C:/la/", "", ""},
+    {"/C:/la:bar", true, LabelPattern::MATCH, "/C:/la/", "bar", ""},
+    {"C:/la:bar", true, LabelPattern::MATCH, "/C:/la/", "bar", ""},
+    {"C:foo", true, LabelPattern::MATCH, "//foo/C/", "foo", ""},
+#endif
   };
 
   for (size_t i = 0; i < arraysize(cases); i++) {