add "did it run on GPU" check to frame_rate_tests.cc using AutomationProxy tracing feature

base/test/trace_event_analyzer.h

Index: base/test/trace_event_analyzer.h
diff --git a/base/test/trace_event_analyzer.h b/base/test/trace_event_analyzer.h
index 4bf48845eb1dcd027fc0843b780a955b2b510dd2..86982ca2b02a791d206498276faa8b83a5cf4b68 100644
--- a/base/test/trace_event_analyzer.h
+++ b/base/test/trace_event_analyzer.h
@@ -131,6 +131,23 @@ struct TraceEvent {
   // Return the argument value if it exists and it is a number.
   bool GetArgAsNumber(const std::string& name, double* arg) const;
 
+  // If you need an argument as a certain integer type, you can use this method
+  // to get it and cast it to your type.

[nduca, 2011/11/01 19:17:49]

Copy the way base-value works? GetArgAsBool/etc. The templating approach can
fall over too easily.

[jbates, 2011/11/03 00:51:07]

Done. Actually since queries already verify the existence of arguments, I added
getters that assume the check for existence has already been made. This makes
the test code a little cleaner.

+  // For example:
+  //   MyEnum my_enum;
+  //   bool found = event.GetArgAsIntType("the_enum", &my_enum);
+  template<class INTEGER_TYPE>
+      bool GetArgAsIntType(const std::string& name, INTEGER_TYPE* arg) const {
+    double arg_double;
+    if (GetArgAsNumber(name, &arg_double)) {
+      // Certain compilers don't allow casting directly from double to enums.
+      int64 arg_int = static_cast<int64>(arg_double);
+      *arg = static_cast<INTEGER_TYPE>(arg_int);
+      return true;
+    }
+    return false;
+  }
+
   // Process ID and Thread ID.
   ProcessThreadID thread;