[ChromeOS] Add Swapped Memory to TaskManager

chrome/browser/task_management/sampling/task_group_sampler.h

Index: chrome/browser/task_management/sampling/task_group_sampler.h
diff --git a/chrome/browser/task_management/sampling/task_group_sampler.h b/chrome/browser/task_management/sampling/task_group_sampler.h
index b70b6eb6288b92302f673e973360b9dc86af177e..00e33c8b8169383e4af07b1c8c8c20c139c02c08 100644
--- a/chrome/browser/task_management/sampling/task_group_sampler.h
+++ b/chrome/browser/task_management/sampling/task_group_sampler.h
@@ -22,15 +22,14 @@ namespace task_management {
 // Wraps the memory usage stats values together so that it can be sent between
 // the UI and the worker threads.
 struct MemoryUsageStats {
-  int64_t private_bytes;
-  int64_t shared_bytes;
-  int64_t physical_bytes;
-
-  MemoryUsageStats()
-      : private_bytes(-1),
-        shared_bytes(-1),
-        physical_bytes(-1) {
-  }
+  int64_t private_bytes = -1;
+  int64_t shared_bytes = -1;
+  int64_t physical_bytes = -1;
+#if defined(OS_CHROMEOS)
+  int64_t swapped_bytes = -1;
+#endif
+
+  MemoryUsageStats() {}
 };
 
 // Defines the expensive process' stats sampler that will calculate these