Reduce signal sender thread stack size to 32k.

src/platform-win32.cc

Index: src/platform-win32.cc
===================================================================
--- src/platform-win32.cc	(revision 10368)
+++ src/platform-win32.cc	(working copy)
@@ -198,7 +198,7 @@
 
 // ----------------------------------------------------------------------------
 // The Time class represents time on win32. A timestamp is represented as
-// a 64-bit integer in 100 nano-seconds since January 1, 1601 (UTC). JavaScript
+// a 64-bit integer in 100 nanoseconds since January 1, 1601 (UTC). JavaScript
 // timestamps are represented as a doubles in milliseconds since 00:00:00 UTC,
 // January 1, 1970.
 
@@ -776,7 +776,7 @@
 
 // We keep the lowest and highest addresses mapped as a quick way of
 // determining that pointers are outside the heap (used mostly in assertions
-// and verification).  The estimate is conservative, ie, not all addresses in
+// and verification).  The estimate is conservative, i.e., not all addresses in
 // 'allocated' space are actually allocated to our heap.  The range is
 // [lowest, highest), inclusive on the low and and exclusive on the high end.
 static void* lowest_ever_allocated = reinterpret_cast<void*>(-1);
@@ -1526,19 +1526,12 @@
 // handle until it is started.
 
 Thread::Thread(const Options& options)
-    : stack_size_(options.stack_size) {
+    : stack_size_(options.stack_size()) {
   data_ = new PlatformData(kNoThread);
-  set_name(options.name);
+  set_name(options.name());
 }
 
 
-Thread::Thread(const char* name)
-    : stack_size_(0) {
-  data_ = new PlatformData(kNoThread);
-  set_name(name);
-}
-
-
 void Thread::set_name(const char* name) {
   OS::StrNCpy(Vector<char>(name_, sizeof(name_)), name, strlen(name));
   name_[sizeof(name_) - 1] = '\0';
@@ -1901,8 +1894,10 @@
 
 class SamplerThread : public Thread {
  public:
+  static const int kSamplerThreadStackSize = 32 * KB;
+
   explicit SamplerThread(int interval)
-      : Thread("SamplerThread"),
+      : Thread(Thread::Options("SamplerThread", kSamplerThreadStackSize)),
         interval_(interval) {}
 
   static void AddActiveSampler(Sampler* sampler) {