Add documentation for MemoryCoordinator-related primitives

base/sys_info.h

Index: base/sys_info.h
diff --git a/base/sys_info.h b/base/sys_info.h
index e35feff735e4ac3783d1870ae04d711ef7cdd7fc..f06752666025dcfaa3756f0c212e008ffa16e7f3 100644
--- a/base/sys_info.h
+++ b/base/sys_info.h
@@ -146,6 +146,7 @@ class BASE_EXPORT SysInfo {
   // Returns true if this is a low-end device.
   // Low-end device refers to devices having less than 512M memory in the
   // current implementation.
+  // See a comment in MemoryCoordinator for how to use it.

[Ryan Sleevi, 2017/02/08 15:02:04]

So, I think this is a 'bad' comment, because it couples //base/sys_info to
//base/memory implementation details. Also, see my other remark about trying to
figure out what "in MemoryCoordinator" means

This is part of why I suggest a //base/memory/docs sort of guidance.

[haraken, 2017/02/09 02:37:31]

Done.

   static bool IsLowEndDevice();
 };