Cleanup: Replace 'DurationInt' with int32, and always use 32-bit integers for tracking time.

base/profiler/tracked_time_unittest.cc

Index: base/profiler/tracked_time_unittest.cc
diff --git a/base/profiler/tracked_time_unittest.cc b/base/profiler/tracked_time_unittest.cc
index b85411d632aa909de627b7243aa660deb8f683ad..cd7f18c4a13be7821b00f9606981c10a972c9b69 100644
--- a/base/profiler/tracked_time_unittest.cc
+++ b/base/profiler/tracked_time_unittest.cc
@@ -28,14 +28,8 @@ TEST(TrackedTimeTest, TrackedTimerMilliseconds) {
   EXPECT_EQ(kReallyBigMilliseconds, (big - base::TimeTicks()).InMilliseconds());
 
   TrackedTime wrapped_big(big);
-#if defined(USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS)
   // Expect wrapping at 32 bits.
   EXPECT_EQ(kSomeMilliseconds, (wrapped_big - TrackedTime()).InMilliseconds());
-#else  // !USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS)
-  // Expect no wrapping at 32 bits.
-  EXPECT_EQ(kReallyBigMilliseconds,
-            (wrapped_big - TrackedTime()).InMilliseconds());
-#endif  // USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS)
 }
 
 TEST(TrackedTimeTest, TrackedTimerDuration) {