Add some TraceAnalyzer utility methods to simplify test code

chrome/test/perf/frame_rate/frame_rate_tests.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/string_number_conversions.h"
@@ skipping 107 matching lines @@
   }
 
   bool DidRunOnGpu(const std::string& json_events) {
     using trace_analyzer::Query;
     using trace_analyzer::TraceAnalyzer;
 
     // Check trace for GPU accleration.
     scoped_ptr<TraceAnalyzer> analyzer(TraceAnalyzer::Create(json_events));
 
     gfx::GLImplementation gl_impl = gfx::kGLImplementationNone;
-    const trace_analyzer::TraceEvent* gpu_event = analyzer->FindOneEvent(
-        Query::EventName() == Query::String("SwapBuffers") &&
+    const trace_analyzer::TraceEvent* gpu_event = analyzer->FindFirstOf(
+        Query::EventNameIs("SwapBuffers") &&
         Query::EventHasNumberArg("GLImpl"));
     if (gpu_event)
       gl_impl = static_cast<gfx::GLImplementation>(
           gpu_event->GetKnownArgAsInt("GLImpl"));
     return (gl_impl == gfx::kGLImplementationDesktopGL ||
             gl_impl == gfx::kGLImplementationEGLGLES2);
   }
 
   void RunTest(const std::string& name) {
 #if defined(OS_WIN)
@@ skipping 164 matching lines @@
     kIsGpuCanvasTest | kInternal | kHasRedirect | kUseGpu | kDisableVsync,
     kIsGpuCanvasTest | kUseReferenceBuild | kInternal | kHasRedirect | kUseGpu,
     kIsGpuCanvasTest | kUseReferenceBuild | kInternal | kHasRedirect | kUseGpu |
         kDisableVsync));
 
 INTERNAL_FRAME_RATE_TEST_CANVAS_GPU(fireflies)
 INTERNAL_FRAME_RATE_TEST_CANVAS_GPU(FishIE)
 INTERNAL_FRAME_RATE_TEST_CANVAS_GPU(speedreading)
 
 }  // namespace