Fix two memory leaks from pdfium_unittests

core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp

Index: core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp
index 95d7c84acef4816dfce7a8c0217a77fd54ed1209..3318bcdfe7393d720cdf588ec1a4e20af4f890fa 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp
@@ -14,6 +14,7 @@ TEST(fpdf_parser_decode, HexDecode) {
     EXPECT_EQ(0, HexDecode(src, 0, dest, dest_size));
     EXPECT_EQ(0, dest_size);
     EXPECT_EQ('\0', dest[0]);
+    FX_Free(dest);
   }
 
   {
@@ -25,6 +26,7 @@ TEST(fpdf_parser_decode, HexDecode) {
     EXPECT_EQ(2, dest_size);
     EXPECT_EQ(18, dest[0]);
     EXPECT_EQ(172, dest[1]);
+    FX_Free(dest);
   }
 
   {
@@ -36,6 +38,7 @@ TEST(fpdf_parser_decode, HexDecode) {
     EXPECT_EQ(2, dest_size);
     EXPECT_EQ(18, dest[0]);
     EXPECT_EQ(160, dest[1]);
+    FX_Free(dest);
   }
 
   {
@@ -47,5 +50,6 @@ TEST(fpdf_parser_decode, HexDecode) {
     EXPECT_EQ(2, dest_size);
     EXPECT_EQ(18, dest[0]);
     EXPECT_EQ(172, dest[1]);
+    FX_Free(dest);
   }
 }