Add GPU memory tab to the task manager.

chrome/browser/ui/webui/task_manager/task_manager_handler.cc

Index: chrome/browser/ui/webui/task_manager/task_manager_handler.cc
diff --git a/chrome/browser/ui/webui/task_manager/task_manager_handler.cc b/chrome/browser/ui/webui/task_manager/task_manager_handler.cc
index 35e0ce57f64e350a87dbd576b9a069b9f933e1ba..5eb4e4e7065869054f80e3e957a5113cc21ace20 100644
--- a/chrome/browser/ui/webui/task_manager/task_manager_handler.cc
+++ b/chrome/browser/ui/webui/task_manager/task_manager_handler.cc
@@ -104,6 +104,14 @@ Value* CreateColumnValue(const TaskManagerModel* tm,
     tm->GetFPS(i, &fps);
     return Value::CreateDoubleValue(fps);
   }
+  if (column_name == "vidmem")
+    return Value::CreateStringValue(tm->GetResourceVidmem(i));
+  if (column_name == "vidmemValue") {
+    size_t vidmem;
+    bool has_duplicates;
+    tm->GetVidmem(i, &vidmem, &has_duplicates);

[yoshiki, 2012/08/16 06:25:59]

Could you handle explicitly GetVidmem() failure? I think you should set
std::numeric_limits<std::size_t>::max() or
std::numeric_limits<std::size_t>::min().

[yoshiki, 2012/08/16 06:27:03]

Sorry, not std::size_t, but double.

[ccameron, 2012/08/16 17:58:30]

GetVidmem will set the value to its minimum (0) on failure, but to be explicit,
I've set it explicitly to 0.

[ccameron, 2012/08/16 17:58:30]

Done.

[ccameron, 2012/08/16 17:58:30]

Done.

+    return Value::CreateDoubleValue(vidmem);
+  }
   if (column_name == "sqliteMemoryUsed")
     return Value::CreateStringValue(tm->GetResourceSqliteMemoryUsed(i));
   if (column_name == "sqliteMemoryUsedValue") {
@@ -170,6 +178,7 @@ const ColumnType kColumnsList[] = {
   {"profileName", false, true},
   {"networkUsage", true, true},
   {"fps", true, true},
+  {"vidmemColumn", true, false},

[yoshiki, 2012/08/16 06:25:59]

s/vidmemColumn/vidmem/

[ccameron, 2012/08/16 17:58:30]

Done.

   {"goatsTeleported", true, true},
   {"canInspect", false, true},
   {"canActivate", false, true}