Fix test naming in previous commit.

The embeddertests binary should have source files ending in
_embeddertest, not _unittest.

TBR=bo_xu@foxitsoftware.com

Review URL: https://codereview.chromium.org/871093004
diff --git a/BUILD.gn b/BUILD.gn
index 0822a5f..a6ea102 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -813,7 +813,7 @@
 
 test("pdfium_embeddertests") {
   sources = [
-    "fpdfsdk/src/fpdf_dataavail_unittest.cpp",
+    "fpdfsdk/src/fpdf_dataavail_embeddertest.cpp",
     "fpdfsdk/src/fpdfdoc_embeddertest.cpp",
     "fpdfsdk/src/fpdfview_embeddertest.cpp",
     "testing/embedder_test.cpp",
diff --git a/fpdfsdk/src/fpdf_dataavail_unittest.cpp b/fpdfsdk/src/fpdf_dataavail_embeddertest.cpp
similarity index 100%
rename from fpdfsdk/src/fpdf_dataavail_unittest.cpp
rename to fpdfsdk/src/fpdf_dataavail_embeddertest.cpp
diff --git a/pdfium.gyp b/pdfium.gyp
index e9c958c..eedbe5d 100644
--- a/pdfium.gyp
+++ b/pdfium.gyp
@@ -838,7 +838,7 @@
         '<(DEPTH)'
       ],
       'sources': [
-        'fpdfsdk/src/fpdf_dataavail_unittest.cpp',
+        'fpdfsdk/src/fpdf_dataavail_embeddertest.cpp',
         'fpdfsdk/src/fpdfdoc_embeddertest.cpp',
         'fpdfsdk/src/fpdfview_embeddertest.cpp',
         'testing/embedder_test.cpp',