[compiler] Remove support for concurrent OSR.

src/full-codegen/arm/full-codegen-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 4156 matching lines @@
 
       // Calculate branch offset to the ok-label - this is the difference
       // between the branch address and |pc| (which points at <blx ip>) plus
       // kProfileCounterResetSequence instructions
       int branch_offset = pc - Instruction::kPCReadOffset - branch_address +
                           kProfileCounterResetSequenceLength;
       patcher.masm()->b(branch_offset, pl);
       break;
     }
     case ON_STACK_REPLACEMENT:
-    case OSR_AFTER_STACK_CHECK:
       //  <decrement profiling counter>
       //   mov r0, r0 (NOP)
       //   ; load on-stack replacement address into ip - either of (for ARMv7):
       //   ; <small cp load>      |  <extended cp load> |  <immediate load>
       //   ldr ip, [pc/pp, #imm]  |   movw ip, #imm     |   movw ip, #imm
       //                          |   movt ip, #imm>    |   movw ip, #imm
       //                          |   ldr  ip, [pp, ip]
       //   ; or (for ARMv6):
       //   ; <small cp load>      |  <extended cp load> |  <immediate load>
       //   ldr ip, [pc/pp, #imm]  |   mov ip, #imm      |   mov ip, #imm
@@ skipping 28 matching lines @@
       pc_immediate_load_address, unoptimized_code);
 
   if (Assembler::IsBranch(Assembler::instr_at(branch_address))) {
     DCHECK(interrupt_address ==
            isolate->builtins()->InterruptCheck()->entry());
     return INTERRUPT;
   }
 
   DCHECK(Assembler::IsNop(Assembler::instr_at(branch_address)));
 
-  if (interrupt_address ==
-      isolate->builtins()->OnStackReplacement()->entry()) {
-    return ON_STACK_REPLACEMENT;
-  }
-
   DCHECK(interrupt_address ==
-         isolate->builtins()->OsrAfterStackCheck()->entry());
-  return OSR_AFTER_STACK_CHECK;
+         isolate->builtins()->OnStackReplacement()->entry());
+  return ON_STACK_REPLACEMENT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM