Fix DevTools CPU profiler after isolates merge.

src/platform-linux.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 932 matching lines @@
           }
         }
         if (runtime_profiler_enabled) {
           if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile,
                                                       NULL)) {
             return;
           }
         }
         Sleep(FULL_INTERVAL);
       }
+      state = SamplerRegistry::GetState();

[Vitaly Repeshko, 2011/03/21 17:16:10]

*Facepalm*

But please fix it in a slightly different way:
SamplerRegistry::State state;
while ((state = SamplerRegistry::GetState()) !=
SamplerRegistry::HAS_NO_SAMPLERS) { ... }

platform-macos.cc also needs to be fixed.

     }
   }
 
   static void DoCpuProfile(Sampler* sampler, void* raw_sender) {
     if (!sampler->IsProfiling()) return;
     SignalSender* sender = reinterpret_cast<SignalSender*>(raw_sender);
     sender->SendProfilingSignal(sampler->platform_data()->vm_tid());
   }
 
   static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
@@ skipping 70 matching lines @@
 
 void Sampler::Stop() {
   ASSERT(IsActive());
   SignalSender::RemoveActiveSampler(this);
   SetActive(false);
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal