Add synthetic delay points for latency testing

base/debug/trace_event_synthetic_delay_unittest.cc

 // Copyright (c) 2013 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/debug/trace_event_synthetic_delay.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 namespace debug {
@@ skipping 26 matching lines @@
   }
 
   void AdvanceTime(base::TimeDelta delta) { now_ += delta; }
 
   int TestFunction() {
     base::TimeTicks start = Now();
     { TRACE_EVENT_SYNTHETIC_DELAY("test.Delay"); }
     return (Now() - start).InMilliseconds();
   }
 
-  int AsyncTestFunctionActivate() {
+  int AsyncTestFunctionBegin() {
     base::TimeTicks start = Now();
-    { TRACE_EVENT_SYNTHETIC_DELAY_ACTIVATE("test.AsyncDelay"); }
+    { TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("test.AsyncDelay"); }
     return (Now() - start).InMilliseconds();
   }
 
-  int AsyncTestFunctionApply() {
+  int AsyncTestFunctionEnd() {
     base::TimeTicks start = Now();
-    { TRACE_EVENT_SYNTHETIC_DELAY_APPLY("test.AsyncDelay"); }
+    { TRACE_EVENT_SYNTHETIC_DELAY_END("test.AsyncDelay"); }
     return (Now() - start).InMilliseconds();
   }
 
  private:
   base::TimeTicks now_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceEventSyntheticDelayTest);
 };
 
 TEST_F(TraceEventSyntheticDelayTest, StaticDelay) {
@@ skipping 17 matching lines @@
   TraceEventSyntheticDelay* delay = ConfigureDelay("test.Delay");
   delay->SetMode(TraceEventSyntheticDelay::ALTERNATING);
   EXPECT_GE(TestFunction(), kTargetDurationMs);
   EXPECT_LT(TestFunction(), kShortDurationMs);
   EXPECT_GE(TestFunction(), kTargetDurationMs);
   EXPECT_LT(TestFunction(), kShortDurationMs);
 }
 
 TEST_F(TraceEventSyntheticDelayTest, AsyncDelay) {
   ConfigureDelay("test.AsyncDelay");
-  EXPECT_LT(AsyncTestFunctionActivate(), kShortDurationMs);
-  EXPECT_GE(AsyncTestFunctionApply(), kTargetDurationMs / 2);
+  EXPECT_LT(AsyncTestFunctionBegin(), kShortDurationMs);
+  EXPECT_GE(AsyncTestFunctionEnd(), kTargetDurationMs / 2);
 }
 
 TEST_F(TraceEventSyntheticDelayTest, AsyncDelayExceeded) {
   ConfigureDelay("test.AsyncDelay");
-  EXPECT_LT(AsyncTestFunctionActivate(), kShortDurationMs);
+  EXPECT_LT(AsyncTestFunctionBegin(), kShortDurationMs);
   AdvanceTime(base::TimeDelta::FromMilliseconds(kTargetDurationMs));
-  EXPECT_LT(AsyncTestFunctionApply(), kShortDurationMs);
+  EXPECT_LT(AsyncTestFunctionEnd(), kShortDurationMs);
 }
 
 TEST_F(TraceEventSyntheticDelayTest, AsyncDelayNoActivation) {
   ConfigureDelay("test.AsyncDelay");
-  EXPECT_LT(AsyncTestFunctionApply(), kShortDurationMs);
+  EXPECT_LT(AsyncTestFunctionEnd(), kShortDurationMs);
 }
 
-TEST_F(TraceEventSyntheticDelayTest, AsyncDelayMultipleActivations) {
+TEST_F(TraceEventSyntheticDelayTest, AsyncDelayNestedActivations) {
   ConfigureDelay("test.AsyncDelay");
-  EXPECT_LT(AsyncTestFunctionActivate(), kShortDurationMs);
-  AdvanceTime(base::TimeDelta::FromMilliseconds(kTargetDurationMs));
-  EXPECT_LT(AsyncTestFunctionActivate(), kShortDurationMs);
-  EXPECT_LT(AsyncTestFunctionApply(), kShortDurationMs);
+  EXPECT_LT(AsyncTestFunctionBegin(), kShortDurationMs);
+  EXPECT_LT(AsyncTestFunctionBegin(), kShortDurationMs);
+  EXPECT_LT(AsyncTestFunctionEnd(), kShortDurationMs);
+  EXPECT_GE(AsyncTestFunctionEnd(), kTargetDurationMs / 2);
 }
 
 TEST_F(TraceEventSyntheticDelayTest, ResetDelays) {
   ConfigureDelay("test.Delay");
-  ResetSyntheticDelays();
+  ResetTraceEventSyntheticDelays();
   EXPECT_LT(TestFunction(), kShortDurationMs);
 }
 
+TEST_F(TraceEventSyntheticDelayTest, ResetAndBeginMultiple) {
+  TraceEventSyntheticDelay* delay = ConfigureDelay("test.AsyncDelay");
+
+  delay->ResetAndBeginMultiple(0);
+  EXPECT_LT(AsyncTestFunctionEnd(), kShortDurationMs);
+
+  delay->ResetAndBeginMultiple(1);
+  EXPECT_GE(AsyncTestFunctionEnd(), kTargetDurationMs);
+}
+
 }  // namespace debug
 }  // namespace base