DevTools: remove nesting depth tracking from coverage

third_party/WebKit/LayoutTests/inspector/coverage/multiple-instances-merge-expected.txt

 
 Tests the coverage list view after finishing recording in the Coverage view.
 
 .../inspector/coverage/resources/coverage.js JS used: 277 unused: 121 total: 402
-.../inspector/coverage/resources/highlight-in-source.css CSS used: 87 unused: 106 total: 209
-Unused lines in highlight-in-source.css
-9,10,11,12,18,19,20,22,23,24
-Unused lines in coverage.js
-3,4,5,11,18,19,20
+.../inspector/coverage/resources/highlight-in-source.css CSS used: 90 unused: 109 total: 209
+0: + body {
+1: +     background-color: lightblue;
+2: * }
+3: - 
+4: * .class {
+5: +     color: red;
+6: * }
+7: - 
+8: - .class2 {
+9: -     color:green;
+10: -     font-style: italic;
+11: - }
+12: - 
+13: * #id {
+14: +     color: blue
+15: * }
+16: - 
+17: - notUsed {
+18: -     color: black
+19: - }
+20: - 
+21: - notUsed2 {
+22: -     color: white
+23: - }
+0: + function outer(index) {
+1: + 
+2: *   function inner1(a) {
+3: -     return a + 1;
+4: *   }
+5: + 
+6: +   function inner2(a) {
+7: +     return a + 2;
+8: +   }
+9: + 
+10: *   function inner3(a) { return a + 3; } function inner4(a) { return a + 4; } function inner5(a) { return a + 5; }
+11: + 
+12: +   return [inner1, inner2, inner3, inner4, inner5][index];
+13: * }
+14: - 
+15: * function performActions() {
+16: +   return outer(1)(0) + outer(3)(0);
+17: - } function outer2() {
+18: -   return outer(0)(0);
+19: - }
+20: