[OLD ATTEMPT, DO NOT REVIEW] mustash: Enable connections to mus from the Chrome renderer

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index c1dffde8e379acdfdbd7d7ca21ac446018c28314..78b91bf62ffd0b34aefcc90e7f29da9496d16c87 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -531,6 +531,7 @@ RenderProcessHostImpl::RenderProcessHostImpl(
       pending_valuebuffer_state_(new gpu::ValueStateMap()),
       subscribe_uniform_enabled_(false),
       channel_connected_(false),
+      mojo_ready_(false),

[Fady Samuel, 2015/11/24 04:42:38]

Revert this.

       sent_render_process_ready_(false),
 #if defined(OS_ANDROID)
       never_signaled_(true, false),
@@ -1534,7 +1535,7 @@ base::ProcessHandle RenderProcessHostImpl::GetHandle() const {
 bool RenderProcessHostImpl::IsReady() const {
   // The process launch result (that sets GetHandle()) and the channel
   // connection (that sets channel_connected_) can happen in either order.
-  return GetHandle() && channel_connected_;
+  return GetHandle() && channel_connected_ && mojo_ready_;
 }
 
 bool RenderProcessHostImpl::Shutdown(int exit_code, bool wait) {
@@ -1626,6 +1627,7 @@ bool RenderProcessHostImpl::OnMessageReceived(const IPC::Message& msg) {
                           OnUserMetricsRecordAction)
       IPC_MESSAGE_HANDLER(ViewHostMsg_SavedPageAsMHTML, OnSavedPageAsMHTML)
       IPC_MESSAGE_HANDLER(ViewHostMsg_Close_ACK, OnCloseACK)
+      IPC_MESSAGE_HANDLER(MojoHostMsg_MojoReady, OnMojoReady)
 #if defined(ENABLE_WEBRTC)
       IPC_MESSAGE_HANDLER(AecDumpMsg_RegisterAecDumpConsumer,
                           OnRegisterAecDumpConsumer)
@@ -2501,6 +2503,17 @@ void RenderProcessHostImpl::OnCloseACK(int old_route_id) {
   holder->Release(old_route_id);
 }
 
+void RenderProcessHostImpl::OnMojoReady() {
+  mojo_ready_ = true;
+  if (IsReady()) {
+    DCHECK(!sent_render_process_ready_);
+    sent_render_process_ready_ = true;
+    // Send RenderProcessReady only if we already received the process handle.
+    FOR_EACH_OBSERVER(RenderProcessHostObserver, observers_,
+                      RenderProcessReady(this));
+  }
+}
+
 void RenderProcessHostImpl::OnSavedPageAsMHTML(int job_id, int64 data_size) {
   bool mhtml_generation_in_renderer_succeeded = data_size >= 0;
   MHTMLGenerationManager::GetInstance()->OnSavedPageAsMHTML(