X87: [fullcodegen] Remove deprecated generator implementation.

  port 09255541 (r41135)

  original commit message:
  This removes the deprecated generator support for resumable functions
  from {FullCodeGenerator}. The existing {AstNumbering} heuristic already
  triggers Ignition for most resumable functions, with this change we make
  said heuristic a hard choice and remove the deprecated code. This also
  has the advantage that any suspended {JSGeneratorObject} instance on the
  heap is guaranteed to have code based on a bytecode array.

BUG=

Review-Url: https://codereview.chromium.org/2522653003
Cr-Commit-Position: refs/heads/master@{#41204}

src/builtins/x87/builtins-x87.cc

@@ -451,7 +451,7 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
     __ PushReturnAddressFrom(eax);
     __ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
     __ mov(eax,
-           FieldOperand(ecx, SharedFunctionInfo::kFormalParameterCountOffset));
+           FieldOperand(eax, SharedFunctionInfo::kFormalParameterCountOffset));
     // We abuse new.target both to indicate that this is a resume call and to
     // pass in the generator object.  In ordinary calls, new.target is always
     // undefined because generator functions are non-constructable.