Test dynamic priorities

base/threading/platform_thread_android.cc

Index: base/threading/platform_thread_android.cc
diff --git a/base/threading/platform_thread_android.cc b/base/threading/platform_thread_android.cc
index fd5e54d8af961fe03c90d3bd6c7b61b111aa6f13..d2648d0eeeeb364d1e0ff204c509217809e8e2da 100644
--- a/base/threading/platform_thread_android.cc
+++ b/base/threading/platform_thread_android.cc
@@ -47,6 +47,19 @@ bool SetCurrentThreadPriorityForPlatform(ThreadPriority priority) {
   return false;
 }
 
+bool SetThreadPriority(PlatformThreadId tid, ThreadPriority priority) {
+  if (priority == ThreadPriority::BACKGROUND) {
+    JNIEnv* env = base::android::AttachCurrentThread();
+    Java_ThreadUtils_setThreadPriorityBackground(env, tid);
+    return true;
+  } else if (priority == ThreadPriority::NORMAL) {
+    JNIEnv* env = base::android::AttachCurrentThread();
+    Java_ThreadUtils_setThreadPriorityNormal(env, tid);
+    return true;
+  }
+  return false;
+}
+
 bool GetCurrentThreadPriorityForPlatform(ThreadPriority* priority) {
   DCHECK(priority);
   *priority = ThreadPriority::NORMAL;
@@ -55,6 +68,14 @@ bool GetCurrentThreadPriorityForPlatform(ThreadPriority* priority) {
       env, PlatformThread::CurrentId())) {
     *priority = ThreadPriority::REALTIME_AUDIO;
     return true;
+  } else if (Java_ThreadUtils_isThreadPriorityNormal(
+                 env, PlatformThread::CurrentId())) {
+    *priority = ThreadPriority::NORMAL;
+    return true;
+  } else if (Java_ThreadUtils_isThreadPriorityBackground(
+                 env, PlatformThread::CurrentId())) {
+    *priority = ThreadPriority::BACKGROUND;
+    return true;
   }
   return false;
 }