Add global and per-WebContents java InterfaceRegistries.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 4d9458af5d687472fd90c0df8b1ca633c1435833..10187d104037ca97078b9e33ddeca6b6f2b2886f 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -123,6 +123,7 @@
 #include "net/http/http_transaction_factory.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
+#include "services/shell/public/cpp/interface_provider.h"
 #include "third_party/WebKit/public/web/WebSandboxFlags.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/accessibility/ax_tree_combiner.h"
@@ -133,6 +134,7 @@
 #if defined(OS_ANDROID)
 #include "content/browser/android/content_video_view.h"
 #include "content/browser/android/date_time_chooser_android.h"
+#include "content/browser/android/java_interfaces_impl.h"
 #include "content/browser/media/android/media_web_contents_observer_android.h"
 #include "content/browser/web_contents/web_contents_android.h"
 #endif  // OS_ANDROID
@@ -4979,6 +4981,16 @@ bool WebContentsImpl::CreateRenderViewForInitialEmptyDocument() {
       frame_tree_.root()->current_replication_state());
 }
 
+shell::InterfaceProvider* WebContentsImpl::GetJavaInterfaces() {
+  if (!java_interfaces_) {
+    shell::mojom::InterfaceProviderPtr provider;
+    BindInterfaceRegistryForWebContents(mojo::GetProxy(&provider), this);
+    java_interfaces_.reset(new shell::InterfaceProvider);
+    java_interfaces_->Bind(std::move(provider));
+  }
+  return java_interfaces_.get();
+}
+
 #elif defined(OS_MACOSX)
 
 void WebContentsImpl::SetAllowOtherViews(bool allow) {