Add IPC stubs between browser and ServiceWorker's worker context in the child process

content/common/service_worker_messages.h

Index: content/common/service_worker_messages.h
diff --git a/content/common/service_worker_messages.h b/content/common/service_worker_messages.h
index d2a5eb27602b15e38c9a351eb9bc231da098c5b3..78beb73bcacef243b06f41ff6e92b4b8c1737cc6 100644
--- a/content/common/service_worker_messages.h
+++ b/content/common/service_worker_messages.h
@@ -5,11 +5,18 @@
 // Message definition file, included multiple times, hence no include guard.
 
 #include "base/strings/string16.h"
+#include "content/common/service_worker_types.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_param_traits.h"
 #include "third_party/WebKit/public/platform/WebServiceWorkerError.h"
 #include "url/gurl.h"
 
+IPC_STRUCT_TRAITS_BEGIN(content::ServiceWorkerFetchRequest)
+  IPC_STRUCT_TRAITS_MEMBER(url)
+  IPC_STRUCT_TRAITS_MEMBER(method)
+  IPC_STRUCT_TRAITS_MEMBER(headers)
+IPC_STRUCT_TRAITS_END()
+
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
@@ -63,11 +70,33 @@ IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_ProviderDestroyed,
 // For EmbeddedWorker related messages -------------------------------------
 
 // Browser -> Renderer message to create a new embedded worker context.
-IPC_MESSAGE_CONTROL3(ServiceWorkerMsg_StartWorker,
+IPC_MESSAGE_CONTROL3(EmbeddedWorkerMsg_StartWorker,
                      int /* embedded_worker_id */,
                      int64 /* service_worker_version_id */,
                      GURL /* script_url */)
 
-// Browser -> Renderer message to terminate the embedded worker.
-IPC_MESSAGE_CONTROL1(ServiceWorkerMsg_TerminateWorker,
+// Browser -> Renderer message to stop (terminate) the embedded worker.
+IPC_MESSAGE_CONTROL1(EmbeddedWorkerMsg_StopWorker,
+                     int /* embedded_worker_id */)
+
+// Renderer -> Browser message to indicate that the worker is started.
+IPC_MESSAGE_CONTROL2(EmbeddedWorkerHostMsg_WorkerStarted,
+                     int /* thread_id */,
+                     int /* embedded_worker_id */)
+
+// Renderer -> Browser message to indicate that the worker is stopped.
+IPC_MESSAGE_CONTROL1(EmbeddedWorkerHostMsg_WorkerStopped,
                      int /* embedded_worker_id */)
+
+// ---------------------------------------------------------------------------
+// For EmbeddedWorkerContext related messages, which are directly sent from
+// browser to the worker thread in the child process. We use a new message class
+// for this for easier cross-thread message dispatching.
+
+#undef IPC_MESSAGE_START
+#define IPC_MESSAGE_START EmbeddedWorkerContextMsgStart
+
+IPC_MESSAGE_CONTROL3(EmbeddedWorkerContextMsg_FetchEvent,
+                     int /* thread_id */,
+                     int /* embedded_worker_id */,
+                     content::ServiceWorkerFetchRequest)