Support profiler stack sampling in any situation.

src/platform-win32.cc

Index: src/platform-win32.cc
diff --git a/src/platform-win32.cc b/src/platform-win32.cc
index c1ec2fc9e9c8190a827e1307143331877556dc11..04e786005d1be867d78155d8b40ff2c4086e856f 100644
--- a/src/platform-win32.cc
+++ b/src/platform-win32.cc
@@ -1750,7 +1750,6 @@ class Sampler::PlatformData : public Malloced {
         SuspendThread(profiled_thread_);
         context.ContextFlags = CONTEXT_FULL;
         GetThreadContext(profiled_thread_, &context);
-        ResumeThread(profiled_thread_);
         // Invoke tick handler with program counter and stack pointer.
         sample.pc = context.Eip;
         sample.sp = context.Esp;
@@ -1761,6 +1760,10 @@ class Sampler::PlatformData : public Malloced {
       sample.state = Logger::state();
       sampler_->Tick(&sample);
 
+      if (sampler_->IsProfiling()) {
+        ResumeThread(profiled_thread_);
+      }
+
       // Wait until next sampling.
       Sleep(sampler_->interval_);
     }