Adjust a test expectation in the stack sampler unit test.

base/profiler/stack_sampling_profiler_unittest.cc

Index: base/profiler/stack_sampling_profiler_unittest.cc
diff --git a/base/profiler/stack_sampling_profiler_unittest.cc b/base/profiler/stack_sampling_profiler_unittest.cc
index 16205ac2b09f22e25975cda252c8306ba6eb918a..0b300d575d73c76f65a6afd7e53a372020a844a3 100644
--- a/base/profiler/stack_sampling_profiler_unittest.cc
+++ b/base/profiler/stack_sampling_profiler_unittest.cc
@@ -547,7 +547,7 @@ void TestLibraryUnload(bool wait_until_unloaded) {
     // the same stack as |wait_until_unloaded|, if not we should have the full
     // stack. The important thing is that we should not crash.
 
-    if ((sample.frames.end() - 1) - end_frame == 2) {
+    if (sample.frames.end() - end_frame == 2) {
       // This is the same case as |wait_until_unloaded|.
       return;
     }