cc: Rename VSync to BeginFrame

chrome/test/perf/rendering/latency_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 "base/command_line.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 81 matching lines @@
   kPaintHeavy   = 1 << 3
 };
 
 const int kWebGLCanvasWidth = 10;
 const int kNumFrames = 80;
 const int kInputsPerFrame = 16;
 // Magic number to identify certain glClear events.
 const int kClearColorGreen = 137;
 const int kMouseY = 5;
 
-// Don't analyze begin frames that may be inaccurate. Latencies can be as high
+// Don't analyze start frames that may be inaccurate. Latencies can be as high
 // as 5 frames or so, so skip the first 6 frames to get more accurate results.
-const int kIgnoreBeginFrames = 6;
+const int kIgnoreStartFrames = 6;
 // Don't analyze end frames that may be inaccurate.
 const int kIgnoreEndFrames = 4;
 // Minimum frames to produce an answer.
 const int kMinimumFramesForAnalysis = 5;
 
 class LatencyTest
     : public BrowserPerfTest,
       public ::testing::WithParamInterface<int> {
  public:
   explicit LatencyTest(LatencyTestMode mode) :
@@ skipping 356 matching lines @@
   std::vector<double> latencies;
   printf("Measured latency (in number of frames) for each frame:\n");
   for (size_t i = 0; i < events.size(); ++i) {
     if (query_end_swaps_.Evaluate(*events[i])) {
       size_t end_swap_pos = i;
 
       // Compositor context swap buffers.
       ++swap_count;
       // Don't analyze first few swaps, because they are filling the rendering
       // pipeline and may be unstable.
-      if (swap_count > kIgnoreBeginFrames) {
+      if (swap_count > kIgnoreStartFrames) {
         // First, find the beginning of this swap.
         size_t begin_swap_pos = 0;
         EXPECT_TRUE(FindLastOf(events, query_begin_swaps_, end_swap_pos,
                                &begin_swap_pos));
 
         int mouse_x = 0;
         if (use_gpu_) {
           // Trace backwards through the events to find the input event that
           // matches the glClear that was presented by this SwapBuffers.
 
@@ skipping 256 matching lines @@
     kInputHeavy | kInputDirty | kRafHeavy, \
     kInputHeavy | kInputDirty | kRafHeavy | kPaintHeavy, \
     kInputDirty | kPaintHeavy, \
     kInputDirty | kRafHeavy | kPaintHeavy)
 
 INSTANTIATE_TEST_CASE_P(, LatencyTestWebGL, LATENCY_SUITE_MODES());
 INSTANTIATE_TEST_CASE_P(, LatencyTestWebGLThread, LATENCY_SUITE_MODES());
 INSTANTIATE_TEST_CASE_P(, LatencyTestSW, LATENCY_SUITE_MODES());
 
 }  // namespace