vswprintf() part 2: retry when clearly out of space.chromium/3057

Use vendor guidance if possible.
Otherwise, avoid allocating N^2 storage for N wide chars.
Update tests to account for strings removed from helper.

Change-Id: I38bbaf936656fb43ec1ae33652da4cabde00247a
Reviewed-on: https://pdfium-review.googlesource.com/3433
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/core/fxcrt/fx_basic_wstring_unittest.cpp b/core/fxcrt/fx_basic_wstring_unittest.cpp
index ceb4616b8a..c5151709e0 100644
--- a/core/fxcrt/fx_basic_wstring_unittest.cpp
+++ b/core/fxcrt/fx_basic_wstring_unittest.cpp
@@ -890,7 +890,7 @@ TEST(fxcrt, WideStringFormatWidth) {
   {
     CFX_WideString str;
     str.Format(L"%1048576d", 1);
-    EXPECT_EQ(L"Bad width", str);
+    EXPECT_EQ(L"", str);
   }
 }
 
@@ -928,7 +928,7 @@ TEST(fxcrt, WideStringFormatPrecision) {
   {
     CFX_WideString str;
     str.Format(L"%.1048576f", 1.2);
-    EXPECT_EQ(L"Bad precision", str);
+    EXPECT_EQ(L"", str);
   }
 }