[SafeBrowsing] Block dangerous unchecked downloads based on a Finch trial.

chrome/browser/file_select_helper_unittest.cc

Index: chrome/browser/file_select_helper_unittest.cc
diff --git a/chrome/browser/file_select_helper_unittest.cc b/chrome/browser/file_select_helper_unittest.cc
index c7c128e3b4ac392060d07aba87ae0454acb3a88d..47b381558857bad95863e03e1e16afcca800482f 100644
--- a/chrome/browser/file_select_helper_unittest.cc
+++ b/chrome/browser/file_select_helper_unittest.cc
@@ -78,3 +78,33 @@ TEST_F(FileSelectHelperTest, ZipPackage) {
   }
 }
 #endif  // defined(OS_MACOSX) && !defined(OS_IOS)
+
+TEST_F(FileSelectHelperTest, GetSanitizedFileName) {
+  // The empty path should be preserved.
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("")),
+            FileSelectHelper::GetSanitizedFileName(base::FilePath()));
+
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("ascii.txt")),
+            FileSelectHelper::GetSanitizedFileName(
+                base::FilePath(FILE_PATH_LITERAL("ascii.txt"))));
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("trailing-spaces-")),
+            FileSelectHelper::GetSanitizedFileName(
+                base::FilePath(FILE_PATH_LITERAL("trailing-spaces "))));
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("path-components-in-name")),
+            FileSelectHelper::GetSanitizedFileName(
+                base::FilePath(FILE_PATH_LITERAL("path/components/in/name"))));
+
+// The following test expectations assume that the tests run with the locale
+// set to en-us. Chrome unit_tests are initialized to use en-us.
+#if defined(OS_WIN)
+  // Invalid UTF-16
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("download")),
+            FileSelectHelper::GetSanitizedFileName(
+                base::FilePath(FILE_PATH_LITERAL("\ud801\udc37\udc17"))));
+#else
+  // Invalid UTF-8
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("download")),
+            FileSelectHelper::GetSanitizedFileName(
+                base::FilePath(FILE_PATH_LITERAL("\xe3\x81\x81\x81\x82"))));
+#endif
+}