Use Node's V8Platform instead of gin's

atom/browser/javascript_environment.cc

@@ -8,6 +8,7 @@
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
+#include "base/task_scheduler/initialization_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/public/common/content_switches.h"
 #include "gin/array_buffer.h"
@@ -44,9 +45,17 @@ bool JavascriptEnvironment::Initialize() {
   if (!js_flags.empty())
     v8::V8::SetFlagsFromString(js_flags.c_str(), js_flags.size());
 
+  // The V8Platform of gin relies on Chromium's task schedule, which has not
+  // been started at this point, so we have to rely on Node's V8Platform.
+  platform_ = node::CreatePlatform(
+      base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.1, 0),
+      uv_default_loop(), nullptr);
+  v8::V8::InitializePlatform(platform_);
+
   gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode,
                                  gin::IsolateHolder::kStableV8Extras,
-                                 gin::ArrayBufferAllocator::SharedInstance());
+                                 gin::ArrayBufferAllocator::SharedInstance(),
+                                 false);
   return true;
 }
 

atom/browser/javascript_environment.h

@@ -10,6 +10,7 @@
 
 namespace node {
 class Environment;
+class NodePlatform;
 }
 
 namespace atom {
@@ -30,6 +31,9 @@ class JavascriptEnvironment {
  private:
   bool Initialize();
 
+  // Leaked on exit.
+  node::NodePlatform* platform_;
+
   bool initialized_;
   gin::IsolateHolder isolate_holder_;
   v8::Isolate* isolate_;

vendor/libchromiumcontent

@@ -1 +1 @@
-Subproject commit 5b358f66a9948225e006fa3807213edf6e604409
+Subproject commit 734f8be87b4962386f532b9b2ea35c6ac0cb9f44