Kill worker process by way of a sync IPC message before it cleans up.

content/browser/worker_host/worker_process_host.h

Index: content/browser/worker_host/worker_process_host.h
diff --git a/content/browser/worker_host/worker_process_host.h b/content/browser/worker_host/worker_process_host.h
index 226d3454f55feedc76c5a96e8831bff1661c47b4..85baf9c82fcd01fcd88e7a08e9f2bf1f96ccb7ec 100644
--- a/content/browser/worker_host/worker_process_host.h
+++ b/content/browser/worker_host/worker_process_host.h
@@ -12,6 +12,7 @@
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/process/process_handle.h"
 #include "content/browser/worker_host/worker_document_set.h"
 #include "content/browser/worker_host/worker_storage_partition.h"
 #include "content/common/content_export.h"
@@ -201,6 +202,10 @@ class WorkerProcessHost : public BrowserChildProcessHostDelegate,
                         const string16& name,
                         bool* result);
 
+  void OnForceKillWorkerProcess(int worker_route_id,
+                                base::ProcessHandle handle,
+                                bool* result);
+
   // Relays a message to the given endpoint.  Takes care of parsing the message
   // if it contains a message port and sending it a valid route id.
   void RelayMessage(const IPC::Message& message,