Code change to avoid signed/unsigned mismatch warnings

core/fpdfapi/fpdf_font/fpdf_font_unittest.cpp

Index: core/fpdfapi/fpdf_font/fpdf_font_unittest.cpp
diff --git a/core/fpdfapi/fpdf_font/fpdf_font_unittest.cpp b/core/fpdfapi/fpdf_font/fpdf_font_unittest.cpp
index dd2119e0cfa693f53d86cfb8784eb836226b2946..0c5ad8a66ac959d77980b0e9fe8f1c09c91068bf 100644
--- a/core/fpdfapi/fpdf_font/fpdf_font_unittest.cpp
+++ b/core/fpdfapi/fpdf_font/fpdf_font_unittest.cpp
@@ -6,12 +6,12 @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST(fpdf_font, StringToCode) {
-  EXPECT_EQ(0, CPDF_ToUnicodeMap::StringToCode(""));
-  EXPECT_EQ(194, CPDF_ToUnicodeMap::StringToCode("<c2"));
-  EXPECT_EQ(162, CPDF_ToUnicodeMap::StringToCode("<A2"));
-  EXPECT_EQ(2802, CPDF_ToUnicodeMap::StringToCode("<Af2"));
-  EXPECT_EQ(12, CPDF_ToUnicodeMap::StringToCode("12"));
-  EXPECT_EQ(128, CPDF_ToUnicodeMap::StringToCode("128"));
+  EXPECT_EQ(0u, CPDF_ToUnicodeMap::StringToCode(""));
+  EXPECT_EQ(194u, CPDF_ToUnicodeMap::StringToCode("<c2"));
+  EXPECT_EQ(162u, CPDF_ToUnicodeMap::StringToCode("<A2"));
+  EXPECT_EQ(2802u, CPDF_ToUnicodeMap::StringToCode("<Af2"));
+  EXPECT_EQ(12u, CPDF_ToUnicodeMap::StringToCode("12"));
+  EXPECT_EQ(128u, CPDF_ToUnicodeMap::StringToCode("128"));
 }
 
 TEST(fpdf_font, StringToWideString) {