Upstream: ChildProcessLauncher connects renderer processes of WebAPKs.

base/android/library_loader/library_loader_hooks.h

Index: base/android/library_loader/library_loader_hooks.h
diff --git a/base/android/library_loader/library_loader_hooks.h b/base/android/library_loader/library_loader_hooks.h
index 1ed09bd54f00020c62e142480642281580f42a06..85c121eedb94a0f97a441e77bbf9470bcf9d598f 100644
--- a/base/android/library_loader/library_loader_hooks.h
+++ b/base/android/library_loader/library_loader_hooks.h
@@ -25,6 +25,8 @@ enum LibraryProcessType {
   PROCESS_WEBVIEW = 3,
   // Shared library is running in child process as part of webview.
   PROCESS_WEBVIEW_CHILD = 4,
+  // Shared library is running in child process as part of WebAPK.
+  PROCESS_WEBAPK_CHILD = 5,
 };
 
 // Record any pending renderer histogram value as a histogram.  Pending values