Make gpu black list work again on Linux

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index d4425cc5d6ec4ba1c227ad942a3b5424e547a29b..86366b54d6cbee075feca8a2bead7f866c34ffa4 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -709,7 +709,7 @@ int BrowserMainLoop::PreCreateThreads() {
         "BrowserMainLoop::CreateThreads:PreCreateThreads");
     TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::PreCreateThreads");
 
-    result_code_ = parts_->PreCreateThreads();
+    result_code_ = parts_->PreCreateThreadsBegin();
   }
 
   // Initialize an instance of FeatureList. This will be a no-op if an instance
@@ -751,7 +751,7 @@ int BrowserMainLoop::PreCreateThreads() {
   // 1) Need to initialize in-process GpuDataManager before creating threads.
   // It's unsafe to append the gpu command line switches to the global
   // CommandLine::ForCurrentProcess object after threads are created.
-  // 2) Must be after parts_->PreCreateThreads to pick up chrome://flags.
+  // 2) Must be after parts_->PreCreateThreadsBegin to pick up chrome://flags.
   GpuDataManagerImpl::GetInstance()->Initialize();
 
 #if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
@@ -761,6 +761,11 @@ int BrowserMainLoop::PreCreateThreads() {
     RenderProcessHost::SetRunRendererInProcess(true);
 #endif
 
+  // parts may want to do some processing just before actually starting the
+  // threads.
+  if (parts_)
+    parts_->PreCreateThreadsEnd();
+
   return result_code_;
 }