cros: Add UMA stat for graphics driver memory on tab discard

chrome/browser/ui/webui/about_ui.cc

Index: chrome/browser/ui/webui/about_ui.cc
diff --git a/chrome/browser/ui/webui/about_ui.cc b/chrome/browser/ui/webui/about_ui.cc
index bd7b8ff29b11325bd98296273b4a6f5da89901f5..db355939f0ced6f4fef19b8ed356bb705f333100 100644
--- a/chrome/browser/ui/webui/about_ui.cc
+++ b/chrome/browser/ui/webui/about_ui.cc
@@ -380,6 +380,10 @@ std::string AboutDiscards(const std::string& path) {
     "Inactive Anon", base::IntToString(meminfo.inactive_anon / 1024)));
   output.append(AddStringRow(
     "Shared", base::IntToString(meminfo.shmem / 1024)));
+  if (meminfo.gem_size != -1) {
+    output.append(AddStringRow(

[DaveMoore, 2012/12/07 18:52:48]

Is this automatically added to a total? If so there will be a problem on Intel.

[James Cook, 2012/12/07 19:41:22]

It's not adding to any other totals in the UI. There will be double-counting on
Intel in the active_anon and inactive_anon above (not sure if in one or both),
but since this is a developer page trying to approximate a dump of /proc/meminfo
I'd like to leave it as-is.

+        "Graphics", base::IntToString(meminfo.gem_size / 1024 / 1024)));
+  }
   output.append("</table>");
 
   AppendFooter(&output);