Create MemoryMonitor and Windows implementation.

components/memory_coordinator/browser/BUILD.gn

Index: components/memory_coordinator/browser/BUILD.gn
diff --git a/components/memory_coordinator/browser/BUILD.gn b/components/memory_coordinator/browser/BUILD.gn
index 0afa65eb2142794517d5a8f7444f57fbd15b1538..fed499dad5d680329c802fe0c127e8996d04f0ef 100644
--- a/components/memory_coordinator/browser/BUILD.gn
+++ b/components/memory_coordinator/browser/BUILD.gn
@@ -6,6 +6,9 @@ static_library("browser") {
   sources = [
     "memory_coordinator.cc",
     "memory_coordinator.h",
+    "memory_monitor.h",
+    "memory_monitor_win.cc",

[bashi, 2016/08/11 22:03:12]

Should we have "if (is_win) { ... }" block?

[chrisha, 2016/08/12 20:14:00]

No need, as _win (and _linux, _chromeos, _mac, etc) files are automatically
added to only platform specific builds. This is the standard way it appears to
be done in GN.

https://cs.chromium.org/search/?q=file:BUILD.gn+_win.cc&sq=package:chromium&t...

[bashi, 2016/08/15 23:29:40]

I didn't know that. Thanks for the explanation.

+    "memory_monitor_win.h",
   ]
 
   deps = [
@@ -23,6 +26,7 @@ source_set("unit_tests") {
 
   sources = [
     "memory_coordinator_unittest.cc",
+    "memory_monitor_win_unittest.cc",
   ]
 
   deps = [