Remove frame pointer from StackHandler.

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 89016f85afa242fb235a513b91dc5874421a2e70..5a17b3a6f3aa2e10fa0743196f8901fe2779fd28 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -2982,23 +2982,16 @@ Operand MacroAssembler::SafepointRegisterSlot(Register reg) {
 void MacroAssembler::PushTryHandler(StackHandler::Kind kind,
                                     int handler_index) {
   // Adjust this code if not the case.
-  STATIC_ASSERT(StackHandlerConstants::kSize == 3 * kPointerSize +
-                                                kFPOnStackSize);
+  STATIC_ASSERT(StackHandlerConstants::kSize == 3 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0);
   STATIC_ASSERT(StackHandlerConstants::kStateOffset == 1 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kContextOffset == 2 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kFPOffset == 3 * kPointerSize);
 
   // We will build up the handler from the bottom by pushing on the stack.
-  // First push the frame pointer and context.
+  // First push the context.
   if (kind == StackHandler::JS_ENTRY) {
-    // The frame pointer does not point to a JS frame so we save NULL for
-    // rbp. We expect the code throwing an exception to check rbp before
-    // dereferencing it to restore the context.
-    pushq(Immediate(0));  // NULL frame pointer.
     Push(Smi::FromInt(0));  // No context.
   } else {
-    pushq(rbp);
     Push(rsi);
   }