Replace whitespace at beginning and end of file with hyphens, rather than silently discarding.

net/base/net_util_unittest.cc

Index: net/base/net_util_unittest.cc
diff --git a/net/base/net_util_unittest.cc b/net/base/net_util_unittest.cc
index fe1805903626839dbd8548236910c6d94d1991aa..d03c2ba4ef740d60a0a63b7b9534f6986827ceb3 100644
--- a/net/base/net_util_unittest.cc
+++ b/net/base/net_util_unittest.cc
@@ -1857,7 +1857,7 @@ TEST(NetUtilTest, GenerateFileName) {
       "",
       "binary/octet-stream",
       L"download",
-      L"evil.exe"
+      L"evil.exe-"
     },
     {
       "http://www.goodguy.com/evil.exe.",
@@ -1866,7 +1866,7 @@ TEST(NetUtilTest, GenerateFileName) {
       "",
       "binary/octet-stream",
       L"download",
-      L"evil.exe"
+      L"evil.exe-"
     },
     {
       "http://www.goodguy.com/evil.exe.  .  .",
@@ -1875,7 +1875,7 @@ TEST(NetUtilTest, GenerateFileName) {
       "",
       "binary/octet-stream",
       L"download",
-      L"evil.exe"
+      L"evil.exe-------"
     },
     {
       "http://www.goodguy.com/evil.",
@@ -1884,7 +1884,7 @@ TEST(NetUtilTest, GenerateFileName) {
       "",
       "binary/octet-stream",
       L"download",
-      L"evil"
+      L"evil-"
     },
     {
       "http://www.goodguy.com/. . . . .",
@@ -1895,6 +1895,15 @@ TEST(NetUtilTest, GenerateFileName) {
       L"download",
       L"download"
     },
+    {
+      "http://www.badguy.com/attachment?name=meh.exe%C2%A0",
+      "attachment; filename=\"meh.exe\xC2\xA0\"",
+      "",
+      "",
+      "binary/octet-stream",
+      L"",
+      L"meh.exe-"
+    },
 #endif  // OS_WIN
     {
       "http://www.goodguy.com/utils.js",
@@ -1993,7 +2002,11 @@ TEST(NetUtilTest, GenerateFileName) {
       "",
       "dance/party",
       L"download",
+#if defined(OS_WIN)
+      L"trailing-"
+#else
       L"trailing"
+#endif //OS_WIN
     },
     {
       "http://www.evil.com/trailing.",
@@ -2002,7 +2015,11 @@ TEST(NetUtilTest, GenerateFileName) {
       "",
       "text/plain",
       L"download",
+#if defined(OS_WIN)
+      L"trailing-" TXT_EXT
+#else
       L"trailing" TXT_EXT
+#endif //OS_WIN
     },
     {
       "http://www.evil.com/.",