Add process lifetime annotations to stack samples.

components/metrics/public/cpp/call_stack_profile_struct_traits_unittest.cc

Index: components/metrics/public/cpp/call_stack_profile_struct_traits_unittest.cc
diff --git a/components/metrics/public/cpp/call_stack_profile_struct_traits_unittest.cc b/components/metrics/public/cpp/call_stack_profile_struct_traits_unittest.cc
index 22265a6182249befd8498621825a99c7f69d02d1..8aa545574f74e6cd1f10f7eb348eb7dfdbcd9495 100644
--- a/components/metrics/public/cpp/call_stack_profile_struct_traits_unittest.cc
+++ b/components/metrics/public/cpp/call_stack_profile_struct_traits_unittest.cc
@@ -224,11 +224,11 @@ TEST_F(CallStackProfileStructTraitsTest, Profile) {
                       Module(0x4100, "b", base::FilePath()),
                     },
                     {
-                      {
-                        Frame(0x4010, 0),
-                        Frame(0x4110, 1),
-                        Frame(0x4110, Frame::kUnknownModuleIndex),
-                      }
+                      Sample({
+                          Frame(0x4010, 0),
+                          Frame(0x4110, 1),
+                          Frame(0x4110, Frame::kUnknownModuleIndex),
+                      }),
                     },
                     base::TimeDelta::FromSeconds(1),
                     base::TimeDelta::FromSeconds(2)),
@@ -242,15 +242,15 @@ TEST_F(CallStackProfileStructTraitsTest, Profile) {
                       Module(0x4100, "b", base::FilePath()),
                     },
                     {
-                      {
-                        Frame(0x4010, 0),
-                        Frame(0x4110, 1),
-                        Frame(0x4110, Frame::kUnknownModuleIndex),
-                      },
-                      {
-                        Frame(0x4010, 0),
-                        Frame(0x4110, 2),
-                      },
+                      Sample({
+                          Frame(0x4010, 0),
+                          Frame(0x4110, 1),
+                          Frame(0x4110, Frame::kUnknownModuleIndex),
+                      }),
+                      Sample({
+                          Frame(0x4010, 0),
+                          Frame(0x4110, 2),
+                      }),
                     },
                     base::TimeDelta::FromSeconds(1),
                     base::TimeDelta::FromSeconds(2)),