Update Chromium to branch 1650 (31.0.1650.63)

Change-Id: I57d8c832eaec1eb2364e0a8e7352a6dd354db99f
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 17 insertions, 89 deletions

diff --git a/chromium/v8/src/v8.cc b/chromium/v8/src/v8.cc
index 521d064129a..e894164cd16 100644
--- a/chromium/v8/src/v8.cc
+++ b/chromium/v8/src/v8.cc
@@ -50,18 +50,9 @@ namespace internal {
 
 V8_DECLARE_ONCE(init_once);
 
-bool V8::is_running_ = false;
-bool V8::has_been_set_up_ = false;
-bool V8::has_been_disposed_ = false;
-bool V8::has_fatal_error_ = false;
-bool V8::use_crankshaft_ = true;
 List<CallCompletedCallback>* V8::call_completed_callbacks_ = NULL;
 v8::ArrayBuffer::Allocator* V8::array_buffer_allocator_ = NULL;
 
-static LazyMutex entropy_mutex = LAZY_MUTEX_INITIALIZER;
-
-static EntropySource entropy_source;
-
 
 bool V8::Initialize(Deserializer* des) {
   InitializeOncePerProcess();
@@ -80,31 +71,18 @@ bool V8::Initialize(Deserializer* des) {
   ASSERT(i::Isolate::CurrentPerIsolateThreadData()->isolate() ==
          i::Isolate::Current());
 
-  if (IsDead()) return false;
-
   Isolate* isolate = Isolate::Current();
+  if (isolate->IsDead()) return false;
   if (isolate->IsInitialized()) return true;
 
-  is_running_ = true;
-  has_been_set_up_ = true;
-  has_fatal_error_ = false;
-  has_been_disposed_ = false;
-
   return isolate->Init(des);
 }
 
 
-void V8::SetFatalError() {
-  is_running_ = false;
-  has_fatal_error_ = true;
-}
-
-
 void V8::TearDown() {
   Isolate* isolate = Isolate::Current();
   ASSERT(isolate->IsDefaultIsolate());
-
-  if (!has_been_set_up_ || has_been_disposed_) return;
+  if (!isolate->IsInitialized()) return;
 
   // The isolate has to be torn down before clearing the LOperand
   // caches so that the optimizing compiler thread (if running)
@@ -118,49 +96,10 @@ void V8::TearDown() {
   RegisteredExtension::UnregisterAll();
   Isolate::GlobalTearDown();
 
-  is_running_ = false;
-  has_been_disposed_ = true;
-
   delete call_completed_callbacks_;
   call_completed_callbacks_ = NULL;
 
   Sampler::TearDown();
-  OS::TearDown();
-}
-
-
-static void seed_random(uint32_t* state) {
-  for (int i = 0; i < 2; ++i) {
-    if (FLAG_random_seed != 0) {
-      state[i] = FLAG_random_seed;
-    } else if (entropy_source != NULL) {
-      uint32_t val;
-      ScopedLock lock(entropy_mutex.Pointer());
-      entropy_source(reinterpret_cast<unsigned char*>(&val), sizeof(uint32_t));
-      state[i] = val;
-    } else {
-      state[i] = random();
-    }
-  }
-}
-
-
-// Random number generator using George Marsaglia's MWC algorithm.
-static uint32_t random_base(uint32_t* state) {
-  // Initialize seed using the system random().
-  // No non-zero seed will ever become zero again.
-  if (state[0] == 0) seed_random(state);
-
-  // Mix the bits.  Never replaces state[i] with 0 if it is nonzero.
-  state[0] = 18273 * (state[0] & 0xFFFF) + (state[0] >> 16);
-  state[1] = 36969 * (state[1] & 0xFFFF) + (state[1] >> 16);
-
-  return (state[0] << 14) + (state[1] & 0x3FFFF);
-}
-
-
-void V8::SetEntropySource(EntropySource source) {
-  entropy_source = source;
 }
 
 
@@ -174,26 +113,18 @@ void V8::SetReturnAddressLocationResolver(
 uint32_t V8::Random(Context* context) {
   ASSERT(context->IsNativeContext());
   ByteArray* seed = context->random_seed();
-  return random_base(reinterpret_cast<uint32_t*>(seed->GetDataStartAddress()));
-}
-
-
-// Used internally by the JIT and memory allocator for security
-// purposes. So, we keep a different state to prevent informations
-// leaks that could be used in an exploit.
-uint32_t V8::RandomPrivate(Isolate* isolate) {
-  ASSERT(isolate == Isolate::Current());
-  return random_base(isolate->private_random_seed());
-}
+  uint32_t* state = reinterpret_cast<uint32_t*>(seed->GetDataStartAddress());
 
+  // When we get here, the RNG must have been initialized,
+  // see the Genesis constructor in file bootstrapper.cc.
+  ASSERT_NE(0, state[0]);
+  ASSERT_NE(0, state[1]);
 
-bool V8::IdleNotification(int hint) {
-  // Returning true tells the caller that there is no need to call
-  // IdleNotification again.
-  if (!FLAG_use_idle_notification) return true;
+  // Mix the bits.  Never replaces state[i] with 0 if it is nonzero.
+  state[0] = 18273 * (state[0] & 0xFFFF) + (state[0] >> 16);
+  state[1] = 36969 * (state[1] & 0xFFFF) + (state[1] >> 16);
 
-  // Tell the heap that it may want to adjust.
-  return HEAP->IdleNotification(hint);
+  return (state[0] << 14) + (state[1] & 0x3FFFF);
 }
 
 
@@ -272,9 +203,10 @@ void V8::InitializeOncePerProcessImpl() {
     FLAG_max_new_space_size = (1 << (kPageSizeBits - 10)) * 2;
   }
 
-  if (FLAG_trace_hydrogen || FLAG_trace_hydrogen_stubs) {
-    // Tracing hydrogen do not work with parallel recompilation.
-    FLAG_parallel_recompilation = false;
+  if (FLAG_concurrent_recompilation &&
+      (FLAG_trace_hydrogen || FLAG_trace_hydrogen_stubs)) {
+    FLAG_concurrent_recompilation = false;
+    PrintF("Concurrent recompilation has been disabled for tracing.\n");
   }
 
   if (FLAG_sweeper_threads <= 0) {
@@ -308,18 +240,14 @@ void V8::InitializeOncePerProcessImpl() {
     FLAG_marking_threads = 0;
   }
 
-  if (FLAG_parallel_recompilation &&
+  if (FLAG_concurrent_recompilation &&
       SystemThreadManager::NumberOfParallelSystemThreads(
           SystemThreadManager::PARALLEL_RECOMPILATION) == 0) {
-    FLAG_parallel_recompilation = false;
+    FLAG_concurrent_recompilation = false;
   }
 
-  OS::SetUp();
   Sampler::SetUp();
   CPU::SetUp();
-  use_crankshaft_ = FLAG_crankshaft
-      && !Serializer::enabled()
-      && CPU::SupportsCrankshaft();
   OS::PostSetUp();
   ElementsAccessor::InitializeOncePerProcess();
   LOperand::SetUpCaches();