Ignore generic IC state count for Ignition->Turbo tier up decision.

We benefit from the optimizing compiler even if the IC state is generic,
so we'd better ignore the generic IC state count for the optimization
decision. This improves our speedometer score from 61.5 to 63.7
(default configuration is 65.9).

Review-Url: https://codereview.chromium.org/2674203002
Cr-Commit-Position: refs/heads/master@{#42955}

src/runtime-profiler.cc

@@ -408,8 +408,7 @@ OptimizationReason RuntimeProfiler::ShouldOptimizeIgnition(
     int typeinfo, generic, total, type_percentage, generic_percentage;
     GetICCounts(function, &typeinfo, &generic, &total, &type_percentage,
                 &generic_percentage);
-    if (type_percentage >= FLAG_type_info_threshold &&
-        generic_percentage <= FLAG_generic_ic_threshold) {
+    if (type_percentage >= FLAG_type_info_threshold) {
       // If this particular function hasn't had any ICs patched for enough
       // ticks, optimize it now.
       return OptimizationReason::kHotAndStable;
@@ -431,8 +430,7 @@ OptimizationReason RuntimeProfiler::ShouldOptimizeIgnition(
     int typeinfo, generic, total, type_percentage, generic_percentage;
     GetICCounts(function, &typeinfo, &generic, &total, &type_percentage,
                 &generic_percentage);
-    if (type_percentage >= FLAG_type_info_threshold &&
-        generic_percentage <= FLAG_generic_ic_threshold) {
+    if (type_percentage >= FLAG_type_info_threshold) {
       return OptimizationReason::kSmallFunction;
     }
   }