Remove the unused hydrogen_track_positions flag.

Change-Id: Ife88feb55f12c592b1c3b4435cd584333953ef6b
Reviewed-on: https://chromium-review.googlesource.com/593619Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47061}

src/flag-definitions.h

@@ -1177,12 +1177,8 @@ DEFINE_BOOL(redirect_code_traces, false,
 DEFINE_STRING(redirect_code_traces_to, NULL,
               "output deopt information and disassembly into the given file")
 
-DEFINE_BOOL(hydrogen_track_positions, false,
-            "track source code positions when building IR")
-
 DEFINE_BOOL(print_opt_source, false,
             "print source code of optimized and inlined functions")
-DEFINE_IMPLICATION(hydrogen_track_positions, print_opt_source)
 
 //
 // Disassembler only flags
@@ -1231,7 +1227,6 @@ DEFINE_BOOL(sodium, false,
 DEFINE_IMPLICATION(sodium, print_code_stubs)
 DEFINE_IMPLICATION(sodium, print_code)
 DEFINE_IMPLICATION(sodium, print_opt_code)
-DEFINE_IMPLICATION(sodium, hydrogen_track_positions)
 DEFINE_IMPLICATION(sodium, code_comments)
 
 DEFINE_BOOL(print_all_code, false, "enable all flags related to printing code")

src/objects.cc

@@ -14297,15 +14297,10 @@ void Code::PrintDeoptLocation(FILE* out, Address pc) {
   Deoptimizer::DeoptInfo info = Deoptimizer::GetDeoptInfo(this, pc);
   class SourcePosition pos = info.position;
   if (info.deopt_reason != DeoptimizeReason::kNoReason || pos.IsKnown()) {
-    if (FLAG_hydrogen_track_positions) {
-      PrintF(out, "            ;;; deoptimize at %d_%d: %s\n", pos.InliningId(),
-             pos.ScriptOffset(), DeoptimizeReasonToString(info.deopt_reason));
-    } else {
-      PrintF(out, "            ;;; deoptimize at ");
-      OFStream outstr(out);
-      pos.Print(outstr, this);
-      PrintF(out, ", %s\n", DeoptimizeReasonToString(info.deopt_reason));
-    }
+    PrintF(out, "            ;;; deoptimize at ");
+    OFStream outstr(out);
+    pos.Print(outstr, this);
+    PrintF(out, ", %s\n", DeoptimizeReasonToString(info.deopt_reason));
   }
 }
 

test/cctest/test-cpu-profiler.cc

@@ -1903,7 +1903,6 @@ TEST(CollectDeoptEvents) {
 
 TEST(SourceLocation) {
   i::FLAG_always_opt = true;
-  i::FLAG_hydrogen_track_positions = true;
   LocalContext env;
   v8::HandleScope scope(CcTest::isolate());