Upstream: ChildProcessLauncher connects renderer processes of WebAPKs.

base/android/library_loader/library_loader_hooks.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_ANDROID_LIBRARY_LOADER_LIBRARY_LOADER_HOOKS_H_
 #define BASE_ANDROID_LIBRARY_LOADER_LIBRARY_LOADER_HOOKS_H_
 
 #include <jni.h>
 
 #include "base/base_export.h"
 
 namespace base {
 namespace android {
 
 // The process the shared library is loaded in.
 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.base.library_loader
 enum LibraryProcessType {
   // The LibraryLoad has not been initialized.
   PROCESS_UNINITIALIZED = 0,
   // Shared library is running in browser process.
   PROCESS_BROWSER = 1,
   // Shared library is running in child process.
   PROCESS_CHILD = 2,
   // Shared library is running in the app that uses webview.
   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,

[michaelbai, 2016/06/02 00:14:51]

Do you really need separated type for WebAPK? From this patch,
PROCESS_WEBAPK_CHILD is defined and set, isn't used anywhere, you shouldn't have
new process type if you don't have to.

[Xi Han, 2016/06/07 18:49:59]

Hmmm, we check the type and did something special for WebAPK when loading the
Chrome's shared library in WebAPK. We may be able to find another way to do it,
but not 100% sure. I will add a TODO here.

 };
 
 // Record any pending renderer histogram value as histograms.  Pending values
 // are set by RegisterChromiumAndroidLinkerRendererHistogram and
 // RegisterLibraryPreloaderRendererHistogram.
 BASE_EXPORT void RecordLibraryLoaderRendererHistograms();
 
 // Registers the callbacks that allows the entry point of the library to be
 // exposed to the calling java code.  This handles only registering the
 // the callbacks needed by the loader. Any application specific JNI bindings
@@ skipping 30 matching lines @@
 BASE_EXPORT LibraryProcessType GetLibraryProcessType(JNIEnv* env);
 
 // Initialize AtExitManager, this must be done at the begining of loading
 // shared library.
 void InitAtExitManager();
 
 }  // namespace android
 }  // namespace base
 
 #endif  // BASE_ANDROID_LIBRARY_LOADER_LIBRARY_LOADER_HOOKS_H_