[inspector] added Debugger.getPossibleBreakpoints perf test

We need this benchmark to measure speedup of getPossibleBreakpoints method by [1].

[1] https://chromium-review.googlesource.com/c/591027/

R=dgozman@chromium.org

Bug: none
Change-Id: I617a435d5a162800caae2fb85596839a57d4d9bd
Reviewed-on: https://chromium-review.googlesource.com/592308Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46992}

test/js-perf-test/Inspector/debugger.js

@@ -3,9 +3,16 @@
 // found in the LICENSE file.
 
 (function() {
-  new BenchmarkSuite('Debugger.paused', [10000], [
-    new Benchmark('Debugger.paused', false, false, 0, DebuggerPaused, Setup, TearDown),
+  function benchy(name, test, testSetup) {
+    new BenchmarkSuite(name, [10000], [
+      new Benchmark(name, false, false, 0, test, testSetup, TearDown)
     ]);
+  }
+
+  benchy('Debugger.paused', DebuggerPaused, Setup);
+  benchy('Debugger.getPossibleBreakpoints',
+    DebuggerGetPossibleBreakpoints,
+    SetupGetPossibleBreakpoints);
 
   function Setup() {
     SendMessage('Debugger.enable');
@@ -22,4 +29,32 @@
       debugger;
     }
   }
+
+  let scriptId;
+  function SetupGetPossibleBreakpoints() {
+    Setup();
+    let expression = '';
+    for (let i = 0; i < 20; ++i) {
+      expression += `function foo${i}(){
+  if (a) {
+    return true;
+  } else {
+    return false;
+  }
+}\n`;
+    }
+    listener = function(msg) {
+      if (msg.method === "Debugger.scriptParsed") {
+        scriptId = msg.params.scriptId;
+        listener = null;
+      }
+    }
+    SendMessage('Runtime.evaluate', {expression});
+  }
+
+  function DebuggerGetPossibleBreakpoints() {
+    SendMessage('Debugger.getPossibleBreakpoints', {
+      start: {lineNumber: 0, columnNumber: 0, scriptId: scriptId}
+    });
+  }
 })();

test/js-perf-test/Inspector/run.js

@@ -4,6 +4,8 @@
 
 load('../base.js');
 
+let listener = null;
+
 load('debugger.js');
 load('runtime.js');
 
@@ -36,3 +38,9 @@ function SendMessage(method, params) {
   }
   send(JSON.stringify(obj));
 }
+
+function receive(message) {
+  if (listener) {
+    listener(JSON.parse(message));
+  }
+}

test/js-perf-test/JSTests.json

@@ -570,7 +570,8 @@
       "results_regexp": "^%s\\-Inspector\\(Score\\): (.+)$",
       "tests": [
         {"name": "Debugger.paused"},
-        {"name": "Runtime.evaluate(String16Cstor)"}
+        {"name": "Runtime.evaluate(String16Cstor)"},
+        {"name": "Debugger.getPossibleBreakpoints"}
       ]
     }
   ]