Cleanup fx_coordinates_unittest.cpp

Test using rect constructor with no args was not testing the result of
the GetOuterRect(), but just comparing the default values from
CFX_FloatRect() constructor.  Fix that by checking |outer_rect|.

Bug: chromium:1019026
Change-Id: Ic5d7fc704559808d6ebdbbbc0d5de6784f36447f
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/63157
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Alan Screen <awscreen@chromium.org>

core/fxcrt/fx_coordinates_unittest.cpp

diff --git a/core/fxcrt/fx_coordinates_unittest.cpp b/core/fxcrt/fx_coordinates_unittest.cpp
index cd26ed5..b90bb8d 100644
--- a/core/fxcrt/fx_coordinates_unittest.cpp
+++ b/core/fxcrt/fx_coordinates_unittest.cpp
@@ -84,10 +84,10 @@
   constexpr float kMaxIntAsFloat = static_cast<float>(kMaxInt);
 
   outer_rect = rect.GetOuterRect();
-  EXPECT_EQ(0, rect.left);
-  EXPECT_EQ(0, rect.bottom);
-  EXPECT_EQ(0, rect.right);
-  EXPECT_EQ(0, rect.top);
+  EXPECT_EQ(0, outer_rect.left);
+  EXPECT_EQ(0, outer_rect.bottom);
+  EXPECT_EQ(0, outer_rect.right);
+  EXPECT_EQ(0, outer_rect.top);
 
   // Function converts from float to int using floor() for left and top, and
   // ceil() for right and bottom.