Provision to start base::SimpleTestTickClock at initial ticks

components/metrics/profiler/tracking_synchronizer_unittest.cc

Index: components/metrics/profiler/tracking_synchronizer_unittest.cc
diff --git a/components/metrics/profiler/tracking_synchronizer_unittest.cc b/components/metrics/profiler/tracking_synchronizer_unittest.cc
index 7e02937edbfa09bd36b2b449016e3723bd728f22..edfce6285e889ddc8326a5264a9e72fd4983d847 100644
--- a/components/metrics/profiler/tracking_synchronizer_unittest.cc
+++ b/components/metrics/profiler/tracking_synchronizer_unittest.cc
@@ -40,9 +40,12 @@ class TestObserver : public TrackingSynchronizerObserver {
         EXPECT_FALSE(got_phase_0_);
         got_phase_0_ = true;
 
-        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMilliseconds(111),
+        // SimpleTestTickClock starts at 1 microsecond, add to expected ticks
+        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMicroseconds(1) +
+                      base::TimeDelta::FromMilliseconds(111),
                   attributes.phase_start);
-        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMilliseconds(333),
+        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMicroseconds(1) +
+                      base::TimeDelta::FromMilliseconds(333),
                   attributes.phase_finish);
 
         EXPECT_EQ("death_thread0",
@@ -54,9 +57,12 @@ class TestObserver : public TrackingSynchronizerObserver {
         EXPECT_FALSE(got_phase_1_);
         got_phase_1_ = true;
 
-        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMilliseconds(333),
+        // SimpleTestTickClock starts at 1 microsecond, add to expected ticks
+        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMicroseconds(1) +
+                      base::TimeDelta::FromMilliseconds(333),
                   attributes.phase_start);
-        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMilliseconds(777),
+        EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMicroseconds(1) +
+                      base::TimeDelta::FromMilliseconds(777),
                   attributes.phase_finish);
 
         EXPECT_EQ("death_thread1",