Push API: send and receive IPC messages for registration.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 692575e6acb82821e8c3d28b8c13cb7a9afb5920..d2a475578610c16a3ec2394c65a6e220c08896dd 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -100,6 +100,7 @@
 #include "content/renderer/memory_benchmarking_extension.h"
 #include "content/renderer/mhtml_generator.h"
 #include "content/renderer/notification_provider.h"
+#include "content/renderer/push_messaging_dispatcher.h"
 #include "content/renderer/render_frame_impl.h"
 #include "content/renderer/render_process.h"
 #include "content/renderer/render_thread_impl.h"
@@ -667,6 +668,7 @@ RenderViewImpl::RenderViewImpl(RenderViewImplParams* params)
       cached_has_main_frame_vertical_scrollbar_(false),
       has_scrolled_focused_editable_node_into_rect_(false),
       notification_provider_(NULL),
+      push_messaging_dispatcher_(NULL),
       geolocation_dispatcher_(NULL),
       input_tag_speech_dispatcher_(NULL),
       speech_recognition_dispatcher_(NULL),
@@ -4471,6 +4473,12 @@ blink::WebMIDIClient* RenderViewImpl::webMIDIClient() {
   return midi_dispatcher_;
 }
 
+blink::WebPushClient* RenderViewImpl::webPushClient() {
+  if (!push_messaging_dispatcher_)
+    push_messaging_dispatcher_ = new PushMessagingDispatcher(this);
+  return push_messaging_dispatcher_;
+}
+
 void RenderViewImpl::draggableRegionsChanged() {
   FOR_EACH_OBSERVER(
       RenderViewObserver,