Revert of Add record-as-much-as-possible mode for about://tracing.

content/browser/tracing/tracing_ui.cc

Index: content/browser/tracing/tracing_ui.cc
diff --git a/content/browser/tracing/tracing_ui.cc b/content/browser/tracing/tracing_ui.cc
index 58fbb753116c1811a58e9c88f2a19255349e75ab..66ae8e8fe4ac6fcaa20feca8ba768d5526a3fc85 100644
--- a/content/browser/tracing/tracing_ui.cc
+++ b/content/browser/tracing/tracing_ui.cc
@@ -86,15 +86,19 @@
   options_ok &= options->GetString("categoryFilter", &category_filter_string);
   *category_filter = base::trace_event::CategoryFilter(category_filter_string);
 
-  std::string record_mode;
-  options_ok &=
-      options->GetString("tracingRecordMode", &record_mode);
-  options_ok &= tracing_options->SetFromString(record_mode);
-
   options_ok &= options->GetBoolean("useSystemTracing",
                                     &tracing_options->enable_systrace);
   options_ok &=
       options->GetBoolean("useSampling", &tracing_options->enable_sampling);
+
+  bool use_continuous_tracing;
+  options_ok &=
+      options->GetBoolean("useContinuousTracing", &use_continuous_tracing);
+
+  if (use_continuous_tracing)
+    tracing_options->record_mode = base::trace_event::RECORD_CONTINUOUSLY;
+  else
+    tracing_options->record_mode = base::trace_event::RECORD_UNTIL_FULL;
 
   if (!options_ok) {
     LOG(ERROR) << "Malformed options";