[BlobAsync] Faster shortcuttin, make renderer controller leaky & alive.

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 b3425b0d72e0ed354646da8c802154312fdf1f17..9496cf1052a219f97fe7abc06ae97ba444c17b7b 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -559,7 +559,7 @@ RenderProcessHostImpl::RenderProcessHostImpl(
       id_(ChildProcessHostImpl::GenerateChildProcessUniqueId()),
       browser_context_(browser_context),
       storage_partition_impl_(storage_partition_impl),
-      sudden_termination_allowed_(true),
+      sudden_termination_blocking_refcount_(0),
       ignore_input_events_(false),
       is_for_guests_only_(is_for_guests_only),
       gpu_observer_registered_(false),
@@ -956,7 +956,10 @@ void RenderProcessHostImpl::CreateMessageFilters() {
       GetID(), storage_partition_impl_->GetURLRequestContext(),
       storage_partition_impl_->GetFileSystemContext(),
       blob_storage_context.get(), StreamContext::GetFor(browser_context)));
-  AddFilter(new BlobDispatcherHost(blob_storage_context.get()));
+  AddFilter(new BlobDispatcherHost(
+      blob_storage_context.get(),
+      base::Bind(&RenderProcessHostImpl::SetSuddenTerminationAllowed,
+                 base::Unretained(this))));
   AddFilter(new FileUtilitiesMessageFilter(GetID()));
   AddFilter(new MimeRegistryMessageFilter());
   AddFilter(
@@ -1680,7 +1683,7 @@ bool RenderProcessHostImpl::FastShutdownIfPossible() {
       !GetHandle())
     return false;  // Render process hasn't started or is probably crashed.
 
-  // Test if there's an unload listener.
+  // Test if there's an unload listener or blobs waiting to be transferred.
   // NOTE: It's possible that an onunload listener may be installed
   // while we're shutting down, so there's a small race here.  Given that
   // the window is small, it's unlikely that the web page has much
@@ -1972,11 +1975,11 @@ void RenderProcessHostImpl::RemovePendingView() {
 }
 
 void RenderProcessHostImpl::SetSuddenTerminationAllowed(bool enabled) {
-  sudden_termination_allowed_ = enabled;
+  sudden_termination_blocking_refcount_ += enabled ? -1 : 1;
 }
 
 bool RenderProcessHostImpl::SuddenTerminationAllowed() const {
-  return sudden_termination_allowed_;
+  return sudden_termination_blocking_refcount_ <= 0;
 }
 
 base::TimeDelta RenderProcessHostImpl::GetChildProcessIdleTime() const {