Do not build googletest/googlemock when building pdfium_test.

By breaking the dependency from test_support to googletest/googlemock.

Change-Id: Icfe675c4ba2977c53834a73cac48901a6cd0636e
Reviewed-on: https://pdfium-review.googlesource.com/c/49993
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

testing/BUILD.gn

diff --git a/testing/BUILD.gn b/testing/BUILD.gn
index a0531de..1f31d74 100644
--- a/testing/BUILD.gn
+++ b/testing/BUILD.gn
@@ -34,8 +34,6 @@
     "../:pdfium",
     "../core/fdrm",
     "image_diff",
-    "//testing/gmock",
-    "//testing/gtest",
   ]
   configs += [ "../:pdfium_core_config" ]
   visibility = [ "../*" ]

testing/utils/bitmap_saver.cpp

diff --git a/testing/utils/bitmap_saver.cpp b/testing/utils/bitmap_saver.cpp
index 38f2cf2..af13efc 100644
--- a/testing/utils/bitmap_saver.cpp
+++ b/testing/utils/bitmap_saver.cpp
@@ -7,8 +7,8 @@
 #include <fstream>
 #include <vector>
 
-#include "testing/gtest/include/gtest/gtest.h"
 #include "testing/image_diff/image_diff_png.h"
+#include "third_party/base/logging.h"
 
 // static
 void BitmapSaver::WriteBitmapToPng(FPDF_BITMAP bitmap,
@@ -30,14 +30,14 @@
                                             &png_encoding);
   }
 
-  ASSERT_TRUE(encoded);
-  ASSERT_LT(filename.size(), 256u);
+  DCHECK(encoded);
+  DCHECK(filename.size() < 256u);
 
   std::ofstream png_file;
   png_file.open(filename, std::ios_base::out | std::ios_base::binary);
   png_file.write(reinterpret_cast<char*>(&png_encoding.front()),
                  png_encoding.size());
-  ASSERT_TRUE(png_file.good());
+  DCHECK(png_file.good());
   png_file.close();
 }