Before this change, we attributed samples for the top-most interpreter frame to the second-topmost frame if we were in a bytecode handler with elided frame. With this change we try to detect that we are in a handler without a frame. If we are, we do not drop the topmost frame.

For example, consider the program

function inner() {
  var s = 0;
  for (var i = 0; i < 100000; i++) {
    s += i * i;
  }
  return s;
}

function trivial() {
  return inner();
}

for (var i = 0; i < 2000; i++) {
  trivial();
}

Before this change, d8 --prof --ignition --nocrankshaft and linux-tick-processor would produce:

  [JavaScript]:
   ticks  total  nonlib   name
   4885   83.4%   83.5%  Function: ~trivial a.js:15:17
    759   13.0%   13.0%  Function: ~inner a.js:7:15

After this change, we get

 [JavaScript]:
   ticks  total  nonlib   name
   5486   95.9%   96.2%  Function: ~inner a.js:7:15
      4    0.1%    0.1%  Function: ~trivial a.js:15:17

Review-Url: https://codereview.chromium.org/2667253004
Cr-Original-Commit-Position: refs/heads/master@{#42894}
Committed: https://chromium.googlesource.com/v8/v8/+/d07f6540c1f9628ed2ba1fa6507c90db07ccc5f5
Review-Url: https://codereview.chromium.org/2667253004
Cr-Commit-Position: refs/heads/master@{#42924}