Fix PEImage tests to use a checked in binary.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index c413d540686a9c508960c29ac94a605bc969e93b..50afb2cca9dd00e0536621596be5c76e7c63f9ee 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -1140,6 +1140,8 @@ source_set("protect_file_posix") {
 }
 
 if (is_win) {
+  # Target to manually rebuild pe_image_test.dll which is checked into
+  # base/test/data/pe_image.
   shared_library("pe_image_test") {
     sources = [
       "win/pe_image_test.cc",
@@ -1464,10 +1466,6 @@ test("base_unittests") {
     set_sources_assignment_filter(sources_assignment_filter)
   }
 
-  if (is_win) {
-    deps += [ ":pe_image_test" ]
-  }
-
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }