Refactor the Android port to allow access to the chrome layer.

android_webview/lib/main/webview_entry_point.cc

Index: android_webview/lib/main/webview_entry_point.cc
diff --git a/android_webview/lib/main/webview_entry_point.cc b/android_webview/lib/main/webview_entry_point.cc
index 04a52dfa134b8a335a5c0d70c9173fa50ef7def1..2053910599c366a5bff4d07a43c2bcb3ce16f6dc 100644
--- a/android_webview/lib/main/webview_entry_point.cc
+++ b/android_webview/lib/main/webview_entry_point.cc
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "android_webview/lib/main/webview_main_delegate.h"
+#include "android_webview/native/android_webview_jni_registrar.h"
 #include "base/android/jni_android.h"
 #include "content/public/app/android_library_loader_hooks.h"
 #include "content/public/app/content_main.h"
@@ -12,9 +13,11 @@
 JNI_EXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
   base::android::InitVM(vm);
   JNIEnv* env = base::android::AttachCurrentThread();
-  if (!content::RegisterLibraryLoaderEntryHook(env)) {
+  if (!content::RegisterLibraryLoaderEntryHook(env))
+    return -1;
+
+  if (!android_webview::RegisterJni(env))
     return -1;
-  }
 
   content::SetContentMainDelegate(new android_webview::WebViewMainDelegate());