cc: Set ui/gpu/cc/ipc/upload/raster thread priorities.

base/threading/platform_thread_posix.cc

Index: base/threading/platform_thread_posix.cc
diff --git a/base/threading/platform_thread_posix.cc b/base/threading/platform_thread_posix.cc
index 444edc58a6268649115f2f1583bc7b56374d961d..b17c34d43d5ccaf92275616147976156b62b6567 100644
--- a/base/threading/platform_thread_posix.cc
+++ b/base/threading/platform_thread_posix.cc
@@ -29,6 +29,7 @@
 #endif
 
 #if defined(OS_ANDROID)
+#include <sys/resource.h>
 #include "base/android/jni_android.h"
 #endif
 
@@ -57,6 +58,13 @@ struct ThreadParams {
 };
 
 void* ThreadFunc(void* params) {
+#if defined(OS_ANDROID)
+  // Threads on linux/android may inherit their priority from the thread
+  // where they were created. This sets all threads to the default.
+  // TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+  if (setpriority(PRIO_PROCESS, PlatformThread::CurrentId(), 0))
+    DVLOG(1) << "Failed to reset initial thread nice value to zero.";
+#endif
   ThreadParams* thread_params = static_cast<ThreadParams*>(params);
   PlatformThread::Delegate* delegate = thread_params->delegate;
   if (!thread_params->joinable)