Consolidate the repetitive hash values used for embedder tests.

PDFium embedder tests often reuse the same testing PDFs, therefore a
lot of the rendering results' hash values are referenced repetitively.
This CL performs the following clean ups:

- Add files embedder_test_constants.cpp and embedder_test_constants.h
  in testing/ directory to hold hash values which are referenced
  across multiple embedder test files.

- Consolidate repetitive hash values, which are only referenced in one
  file, into that file's unnamed namespaces.

Bug: pdfium:1500
Change-Id: I803df232236c7cb3f7e27f30f8fdaf36f1aa4db5
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/69171
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Hui Yingst <nigi@chromium.org>
diff --git a/testing/embedder_test_constants.cpp b/testing/embedder_test_constants.cpp
new file mode 100644
index 0000000..2c81dfd
--- /dev/null
+++ b/testing/embedder_test_constants.cpp
@@ -0,0 +1,38 @@
+// Copyright 2020 The PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "testing/embedder_test_constants.h"
+
+#include "build/build_config.h"
+
+namespace pdfium {
+
+const char kBlankPage612By792Checksum[] = "1940568c9ba33bac5d0b1ee9558c76b3";
+
+#if defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_)
+const char kBug890322Checksum[] = "793689536cf64fe792c2f241888c0cf3";
+#else
+const char kBug890322Checksum[] = "6c674642154408e877d88c6c082d67e9";
+#endif
+
+#if defined(OS_WIN)
+const char kHelloWorldChecksum[] = "795b7ce1626931aa06af0fa23b7d80bb";
+const char kHelloWorldRemovedChecksum[] = "93db13099042bafefb3c22a165bad684";
+#elif defined(OS_MACOSX)
+const char kHelloWorldChecksum[] = "c38b75e16a13852aee3b97d77a0f0ee7";
+const char kHelloWorldRemovedChecksum[] = "572b1022bb3e8f43dc671162fc62cf7f";
+#else
+const char kHelloWorldChecksum[] = "2baa4c0e1758deba1b9c908e1fbd04ed";
+const char kHelloWorldRemovedChecksum[] = "93dcc09055f87a2792c8e3065af99a1b";
+#endif
+
+#if defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_)
+const char kManyRectanglesChecksum[] = "4e7e280c1597222afcb0ee3bb90ec119";
+const char kRectanglesChecksum[] = "b4e411a6b5ffa59a50efede2efece597";
+#else
+const char kManyRectanglesChecksum[] = "b0170c575b65ecb93ebafada0ff0f038";
+const char kRectanglesChecksum[] = "0a90de37f52127619c3dfb642b5fa2fe";
+#endif
+
+}  // namespace pdfium