X87: Rework CallApi*Stubs.

  port 5096492f (r34627)

  original commit message:
  - Eliminate stubs with a variable number of arguments.
    (That only worked due to their very limited use. These
     stubs' interface descriptors were basically lying
     about their number of args, which will fail when used
     generically.)
  - Fix all CallApi*Stubs' interface descriptors to no
    longer lie about their arguments.
  - Unify CallApi*Stub, for * in Function, Accessor,
    FunctionWithFixedArgs.
    (Since these are now all doing the same thing.)
  - Rename the unified stub (and interface descriptors) to
    *ApiCallback*, since that's really what they're doing.
  - Refuse inlining an API callback if its number of
    parameters exceeds the supported number of args.

BUG=

Review URL: https://codereview.chromium.org/1784623006

Cr-Commit-Position: refs/heads/master@{#34700}

src/x87/code-stubs-x87.cc

@@ -5391,8 +5391,6 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   STATIC_ASSERT(FCA::kHolderIndex == 0);
   STATIC_ASSERT(FCA::kArgsLength == 7);
 
-  DCHECK(argc.is_immediate() || eax.is(argc.reg()));
-
   __ pop(return_address);
   // context save.
   __ push(context);
@@ -5448,7 +5446,7 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   // FunctionCallbackInfo::values_.
   __ mov(ApiParameterOperand(3), scratch);
   // FunctionCallbackInfo::length_.
-  __ Move(ApiParameterOperand(4), Immediate(argc));
+  __ Move(ApiParameterOperand(4), Immediate(argc()));
   // FunctionCallbackInfo::is_construct_call_.
   __ Move(ApiParameterOperand(5), Immediate(0));