base: Move renderer threads to the appropriate cpuset.

content/child/child_thread_impl.h

Index: content/child/child_thread_impl.h
diff --git a/content/child/child_thread_impl.h b/content/child/child_thread_impl.h
index 5a9de6dbf1cdc30eff83809b3eeb926da9a71b44..34b87e26f6e90b63548b613c0f32f2a32a4a2453 100644
--- a/content/child/child_thread_impl.h
+++ b/content/child/child_thread_impl.h
@@ -128,6 +128,11 @@ class CONTENT_EXPORT ChildThreadImpl
       IPC::Sender* sender,
       bool* out_of_memory);
 
+#if defined(OS_LINUX)
+  void SetThreadPriority(base::PlatformThreadId id,
+                         base::ThreadPriority priority);
+#endif
+
   ChildSharedBitmapManager* shared_bitmap_manager() const {
     return shared_bitmap_manager_.get();
   }