Fix FPDFAnnotEmbedderTest.AddAndModifyPath for Skia.

When Skia/SkiaPaths is enabled, the rendering results have small
discrepancies on the edges of texts and the stamps compared to AGG
results.

The text rendering difference is acceptable and it's caused by Skia
uses different font face rendering methods compared to AGG (See
https://crbug.com/pdfium/1500#c7).

The stamp rendering results for Skia shows improvement (smoother)
compared to AGG results.

This CL updates Skia specific expected results so that this embedder
test can pass.

Bug: pdfium:1500
Change-Id: Ie7eb5a940d1672fdb9026fd701de9aa18cb5275b
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/69831
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Hui Yingst <nigi@chromium.org>

fpdfsdk/fpdf_annot_embeddertest.cpp

diff --git a/fpdfsdk/fpdf_annot_embeddertest.cpp b/fpdfsdk/fpdf_annot_embeddertest.cpp
index 686fe95..1869e34 100644
--- a/fpdfsdk/fpdf_annot_embeddertest.cpp
+++ b/fpdfsdk/fpdf_annot_embeddertest.cpp
@@ -28,6 +28,15 @@
 
 namespace {
 
+#if defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_)
+#if defined(OS_LINUX)
+const char kAnnotationStampWithApChecksum[] =
+    "db83eaadc92967e3ac9bebfc6178ca75";
+#else
+const char kAnnotationStampWithApChecksum[] =
+    "3c87b4a8e51245964357fb5f5fbc612b";
+#endif  // defined(OS_LINUX)
+#else
 #if defined(OS_WIN)
 const char kAnnotationStampWithApChecksum[] =
     "6aa001a77ec05d0f1b0d1d22e28744d4";
@@ -38,6 +47,7 @@
 const char kAnnotationStampWithApChecksum[] =
     "b42cef463483e668eaf4055a65e4f1f5";
 #endif
+#endif  // defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_)
 
 void VerifyFocusableAnnotSubtypes(
     FPDF_FORMHANDLE form_handle,
@@ -773,26 +783,32 @@
   FPDF_CloseDocument(new_doc);
 }
 
-// TODO(crbug.com/pdfium/11): Fix this test and enable.
+TEST_F(FPDFAnnotEmbedderTest, AddAndModifyPath) {
 #if defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_)
-#define MAYBE_AddAndModifyPath DISABLED_AddAndModifyPath
+#if defined(OS_LINUX)
+  static const char kMd5ModifiedPath[] = "d76382fd57fafad0233f7549f871dafa";
+  static const char kMd5TwoPaths[] = "323151317b8cb62130546c7b8d70f622";
+  static const char kMd5NewAnnot[] = "9a3b02d876620d19787549ee1100b63c";
 #else
-#define MAYBE_AddAndModifyPath AddAndModifyPath
-#endif
-TEST_F(FPDFAnnotEmbedderTest, MAYBE_AddAndModifyPath) {
-#if defined(OS_MACOSX)
-  static const char kMd5ModifiedPath[] = "8cfae6d547fc5d6702f5f1ac631beb5e";
-  static const char kMd5TwoPaths[] = "9677e4892bb02950d3e4dbe74470578f";
-  static const char kMd5NewAnnot[] = "e8ebddac4db8c0a4b556ddf79aa1a26d";
-#elif defined(OS_WIN)
+  static const char kMd5ModifiedPath[] = "c9ba60887a312370d9a32198aa53aca4";
+  static const char kMd5TwoPaths[] = "0768d56373094fcdf4ddf3f3364c006f";
+  static const char kMd5NewAnnot[] = "6f7e1c189bcfac90ffccf2a527857006";
+#endif  // defined(OS_LINUX)
+#else
+#if defined(OS_WIN)
   static const char kMd5ModifiedPath[] = "a7a8d675a6ddbcbdfecee65a33ba19e1";
   static const char kMd5TwoPaths[] = "7c0bdd4552329704c47a7cce47edbbd6";
   static const char kMd5NewAnnot[] = "3c48d492b4f62941fed0fb62f729f31e";
+#elif defined(OS_MACOSX)
+  static const char kMd5ModifiedPath[] = "8cfae6d547fc5d6702f5f1ac631beb5e";
+  static const char kMd5TwoPaths[] = "9677e4892bb02950d3e4dbe74470578f";
+  static const char kMd5NewAnnot[] = "e8ebddac4db8c0a4b556ddf79aa1a26d";
 #else
   static const char kMd5ModifiedPath[] = "6ff77d6d1fec4ea571fabe0c7a19b517";
   static const char kMd5TwoPaths[] = "ca37ad549e74ac5b359a055708f3e7b6";
   static const char kMd5NewAnnot[] = "0d7a0e33fbf41ff7fa5d732ab2c5edff";
 #endif
+#endif  // defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_)
 
   // Open a file with two annotations and load its first page.
   ASSERT_TRUE(OpenDocument("annotation_stamp_with_ap.pdf"));