Move the android library loader from content to base

content/app/android/child_process_service.cc

Index: content/app/android/child_process_service.cc
diff --git a/content/app/android/child_process_service.cc b/content/app/android/child_process_service.cc
index 308246ef96cc5f38bd6c64a713e82d6570bda262..dae54e5941d31fbba56b4f9ce75843ef42ed9eea 100644
--- a/content/app/android/child_process_service.cc
+++ b/content/app/android/child_process_service.cc
@@ -8,6 +8,7 @@
 #include <cpu-features.h>
 
 #include "base/android/jni_array.h"
+#include "base/android/library_loader/library_loader_hooks.h"
 #include "base/android/memory_pressure_listener_android.h"
 #include "base/logging.h"
 #include "base/posix/global_descriptors.h"
@@ -127,7 +128,7 @@ void InitChildProcess(JNIEnv* env,
 
 void ExitChildProcess(JNIEnv* env, jclass clazz) {
   VLOG(0) << "ChildProcessService: Exiting child process.";
-  LibraryLoaderExitHook();
+  base::android::LibraryLoaderExitHook();
   _exit(0);
 }