content: Crash key and trace counter cleanup.

chrome/common/crash_keys.cc

Index: chrome/common/crash_keys.cc
diff --git a/chrome/common/crash_keys.cc b/chrome/common/crash_keys.cc
index b90f1e2c31a9b84827d557a0165103bf80405593..1983f0d73ec93b37ac16d974176d59dfb2611c88 100644
--- a/chrome/common/crash_keys.cc
+++ b/chrome/common/crash_keys.cc
@@ -145,14 +145,13 @@ size_t RegisterChromeCrashKeys() {
     { kGPURenderer, kSmallSize },
 #endif
 
-    // base/:
-    { "dm-usage", kSmallSize },
-    { "dm-usage-free", kSmallSize },
-    { "total-dm-usage", kSmallSize },
     // content/:
+    { "discardable-memory-allocated", kSmallSize },
+    { "discardable-memory-free", kSmallSize },
     { kFontKeyName, kSmallSize},
     { "ppapi_path", kMediumSize },
     { "subresource_url", kLargeSize },
+    { "total-discardable-memory-allocated", kSmallSize },
 #if defined(OS_CHROMEOS)
     { kNumberOfUsers, kSmallSize },
 #endif