Revert "Revert interrupt handling code changed in r21208."

src/execution.h

 // Copyright 2014 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.
 
 #ifndef V8_EXECUTION_H_
 #define V8_EXECUTION_H_
 
 #include "handles.h"
 
 namespace v8 {
@@ skipping 192 matching lines @@
 enum InterruptFlag {
 #define V(NAME, Name) NAME,
   INTERRUPT_LIST(V)
 #undef V
   NUMBER_OF_INTERRUPTS
 };
 
   bool CheckInterrupt(int flagbit);
   void RequestInterrupt(int flagbit);
   void ClearInterrupt(int flagbit);
+  bool CheckAndClearInterrupt(InterruptFlag flag, const ExecutionAccess& lock);
 
   void InvokeApiInterruptCallback();
 
   // You should hold the ExecutionAccess lock when calling this method.
   bool has_pending_interrupts(const ExecutionAccess& lock) {
     // Sanity check: We shouldn't be asking about pending interrupts
     // unless we're not postponing them anymore.
     ASSERT(!should_postpone_interrupts(lock));
     return thread_local_.interrupt_flags_ != 0;
   }
@@ skipping 59 matching lines @@
   friend class Isolate;
   friend class StackLimitCheck;
   friend class PostponeInterruptsScope;
 
   DISALLOW_COPY_AND_ASSIGN(StackGuard);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_EXECUTION_H_