Remove static initializers in v8.

src/v8.cc

Index: src/v8.cc
diff --git a/src/v8.cc b/src/v8.cc
index e4b37b180e1f49eefc2601ed93a846769c961c8f..4c5e02039a6ef6d21120e2d7d1c5edb0d81a5b50 100644
--- a/src/v8.cc
+++ b/src/v8.cc
@@ -36,6 +36,8 @@
 #include "hydrogen.h"
 #include "lithium-allocator.h"
 #include "log.h"
+#include "once.h"
+#include "platform.h"
 #include "runtime-profiler.h"
 #include "serialize.h"
 #include "store-buffer.h"
@@ -43,8 +45,7 @@
 namespace v8 {
 namespace internal {
 
-static Mutex* init_once_mutex = OS::CreateMutex();
-static bool init_once_called = false;
+V8_DECLARE_ONCE(init_once);
 
 bool V8::is_running_ = false;
 bool V8::has_been_set_up_ = false;
@@ -53,7 +54,8 @@ bool V8::has_fatal_error_ = false;
 bool V8::use_crankshaft_ = true;
 List<CallCompletedCallback>* V8::call_completed_callbacks_ = NULL;
 
-static Mutex* entropy_mutex = OS::CreateMutex();
+static LazyMutex entropy_mutex = LAZY_MUTEX_INITIALIZER;
+
 static EntropySource entropy_source;
 
 
@@ -117,7 +119,7 @@ static void seed_random(uint32_t* state) {
       state[i] = FLAG_random_seed;
     } else if (entropy_source != NULL) {
       uint32_t val;
-      ScopedLock lock(entropy_mutex);
+      ScopedLock lock(entropy_mutex.Pointer());
       entropy_source(reinterpret_cast<unsigned char*>(&val), sizeof(uint32_t));
       state[i] = val;
     } else {
@@ -233,12 +235,7 @@ Object* V8::FillHeapNumberWithRandom(Object* heap_number,
   return heap_number;
 }
 
-
-void V8::InitializeOncePerProcess() {
-  ScopedLock lock(init_once_mutex);
-  if (init_once_called) return;
-  init_once_called = true;
-
+void V8::InitializeOncePerProcessImpl() {
   // Set up the platform OS support.
   OS::SetUp();
 
@@ -264,4 +261,8 @@ void V8::InitializeOncePerProcess() {
   }
 }
 
+void V8::InitializeOncePerProcess() {
+  CallOnce(&init_once, &InitializeOncePerProcessImpl);
+}
+
 } }  // namespace v8::internal