Remove the obsolete Code::IsPregenerated flag.

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index fbc2f111c154efc6dbb42fda234733d44c30dbe9..6f35a210c6a7e11f6aff6297bb2cf4501a9d56ea 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -2798,9 +2798,9 @@ void CodeStub::GenerateFPStubs(Isolate* isolate) {
 
 void CEntryStub::GenerateAheadOfTime(Isolate* isolate) {
   CEntryStub stub(1, kDontSaveFPRegs);
-  stub.GetCode(isolate)->set_is_pregenerated(true);
+  stub.GetCode(isolate);
   CEntryStub save_doubles(1, kSaveFPRegs);
-  save_doubles.GetCode(isolate)->set_is_pregenerated(true);
+  save_doubles.GetCode(isolate);
 }
 
 
@@ -5078,9 +5078,9 @@ void NameDictionaryLookupStub::Generate(MacroAssembler* masm) {
 void StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime(
     Isolate* isolate) {
   StoreBufferOverflowStub stub1(kDontSaveFPRegs);
-  stub1.GetCode(isolate)->set_is_pregenerated(true);
+  stub1.GetCode(isolate);
   StoreBufferOverflowStub stub2(kSaveFPRegs);
-  stub2.GetCode(isolate)->set_is_pregenerated(true);
+  stub2.GetCode(isolate);
 }
 
 
@@ -5574,12 +5574,12 @@ static void ArrayConstructorStubAheadOfTimeHelper(Isolate* isolate) {
   for (int i = 0; i <= to_index; ++i) {
     ElementsKind kind = GetFastElementsKindFromSequenceIndex(i);
     T stub(kind);
-    stub.GetCode(isolate)->set_is_pregenerated(true);
+    stub.GetCode(isolate);
     if (AllocationSite::GetMode(kind) != DONT_TRACK_ALLOCATION_SITE ||
         (!FLAG_track_allocation_sites &&
          (kind == initial_kind || kind == initial_holey_kind))) {
       T stub1(kind, CONTEXT_CHECK_REQUIRED, DISABLE_ALLOCATION_SITES);
-      stub1.GetCode(isolate)->set_is_pregenerated(true);
+      stub1.GetCode(isolate);
     }
   }
 }
@@ -5601,11 +5601,11 @@ void InternalArrayConstructorStubBase::GenerateStubsAheadOfTime(
   for (int i = 0; i < 2; i++) {
     // For internal arrays we only need a few things
     InternalArrayNoArgumentConstructorStub stubh1(kinds[i]);
-    stubh1.GetCode(isolate)->set_is_pregenerated(true);
+    stubh1.GetCode(isolate);
     InternalArraySingleArgumentConstructorStub stubh2(kinds[i]);
-    stubh2.GetCode(isolate)->set_is_pregenerated(true);
+    stubh2.GetCode(isolate);
     InternalArrayNArgumentsConstructorStub stubh3(kinds[i]);
-    stubh3.GetCode(isolate)->set_is_pregenerated(true);
+    stubh3.GetCode(isolate);
   }
 }