Trace category groups and category filter.

chrome/test/base/tracing.cc

Index: chrome/test/base/tracing.cc
diff --git a/chrome/test/base/tracing.cc b/chrome/test/base/tracing.cc
index 9ab978d35a32318ae439c1dd41164a09abafc1b4..103c7f7635910a7b95d6130462ee07679fff7c14 100644
--- a/chrome/test/base/tracing.cc
+++ b/chrome/test/base/tracing.cc
@@ -27,20 +27,20 @@ class InProcessTraceController : public content::TraceSubscriber {
         watch_notification_count_(0) {}
   virtual ~InProcessTraceController() {}
 
-  bool BeginTracing(const std::string& categories) {
+  bool BeginTracing(const std::string& tag_patterns) {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     return content::TraceController::GetInstance()->BeginTracing(
-        this, categories);
+        this, tag_patterns);
   }
 
-  bool BeginTracingWithWatch(const std::string& categories,
+  bool BeginTracingWithWatch(const std::string& tag_patterns,
                              const std::string& category_name,
                              const std::string& event_name,
                              int num_occurrences) {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     DCHECK(num_occurrences > 0);
     watch_notification_count_ = num_occurrences;
-    return BeginTracing(categories) &&
+    return BeginTracing(tag_patterns) &&
            content::TraceController::GetInstance()->SetWatchEvent(
                this, category_name, event_name);
   }
@@ -135,16 +135,16 @@ class InProcessTraceController : public content::TraceSubscriber {
 
 namespace tracing {
 
-bool BeginTracing(const std::string& categories) {
-  return InProcessTraceController::GetInstance()->BeginTracing(categories);
+bool BeginTracing(const std::string& tag_patterns) {
+  return InProcessTraceController::GetInstance()->BeginTracing(tag_patterns);
 }
 
-bool BeginTracingWithWatch(const std::string& categories,
+bool BeginTracingWithWatch(const std::string& tag_patterns,
                            const std::string& category_name,
                            const std::string& event_name,
                            int num_occurrences) {
   return InProcessTraceController::GetInstance()->BeginTracingWithWatch(
-      categories, category_name, event_name, num_occurrences);
+      tag_patterns, category_name, event_name, num_occurrences);
 }
 
 bool WaitForWatchEvent(base::TimeDelta timeout) {