Test dynamic priorities on android (1F + 1B)

base/android/java/src/org/chromium/base/ThreadUtils.java

Index: base/android/java/src/org/chromium/base/ThreadUtils.java
diff --git a/base/android/java/src/org/chromium/base/ThreadUtils.java b/base/android/java/src/org/chromium/base/ThreadUtils.java
index ef2887acd0c97e5c8ca97beb489c1dbe50302d98..a4ae663d1a9bb11aa69e2f1dfabecf198966db87 100644
--- a/base/android/java/src/org/chromium/base/ThreadUtils.java
+++ b/base/android/java/src/org/chromium/base/ThreadUtils.java
@@ -212,6 +212,22 @@ public class ThreadUtils {
     }
 
     /**
+     * Set thread priority to foreground.
+     */
+    @CalledByNative
+    public static void setThreadPriorityNormal(int tid) {
+        Process.setThreadPriority(tid, Process.THREAD_PRIORITY_DEFAULT);
+    }
+
+    /**
+     * Set thread priority to backbround.
+     */
+    @CalledByNative
+    public static void setThreadPriorityBackground(int tid) {
+        Process.setThreadPriority(tid, Process.THREAD_PRIORITY_BACKGROUND);
+    }
+
+    /**
      * Checks whether Thread priority is THREAD_PRIORITY_AUDIO or not.
      * @param tid Thread id.
      * @return true for THREAD_PRIORITY_AUDIO and false otherwise.
@@ -220,4 +236,24 @@ public class ThreadUtils {
     private static boolean isThreadPriorityAudio(int tid) {
         return Process.getThreadPriority(tid) == Process.THREAD_PRIORITY_AUDIO;
     }
+
+    /**
+     * Checks whether Thread priority is THREAD_PRIORITY_DEFAULT or not.
+     * @param tid Thread id.
+     * @return true for THREAD_PRIORITY_DEFAULT and false otherwise.
+     */
+    @CalledByNative
+    private static boolean isThreadPriorityNormal(int tid) {
+        return Process.getThreadPriority(tid) == Process.THREAD_PRIORITY_DEFAULT;
+    }
+
+    /**
+     * Checks whether Thread priority is THREAD_PRIORITY_BACKGROUND or not.
+     * @param tid Thread id.
+     * @return true for THREAD_PRIORITY_BACKGROUND and false otherwise.
+     */
+    @CalledByNative
+    private static boolean isThreadPriorityBackground(int tid) {
+        return Process.getThreadPriority(tid) == Process.THREAD_PRIORITY_BACKGROUND;
+    }
 }