Fix a typo in FPDFSignatureEmbedderTest.GetByteRange.

There exists an out-of-place call to FPDFSignatureObj_GetContents(). It
should be a call to FPDFSignatureObj_GetByteRange() instead.

Change-Id: I5be561f0a9bd33743134492cddd81ad620a08997
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/72019
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/fpdfsdk/fpdf_signature_embeddertest.cpp b/fpdfsdk/fpdf_signature_embeddertest.cpp
index 5df611a..7e1f0fc 100644
--- a/fpdfsdk/fpdf_signature_embeddertest.cpp
+++ b/fpdfsdk/fpdf_signature_embeddertest.cpp
@@ -81,7 +81,7 @@
   ASSERT_EQ(kExpectedByteRange, byte_range);
 
   // FPDFSignatureObj_GetByteRange() negative testing.
-  ASSERT_EQ(0U, FPDFSignatureObj_GetContents(nullptr, nullptr, 0));
+  ASSERT_EQ(0U, FPDFSignatureObj_GetByteRange(nullptr, nullptr, 0));
 
   byte_range.resize(2);
   byte_range[0] = 0;