Show OOM notification bar in all tabs sharing same render process

chrome/browser/renderer_host/out_of_memory_message_filter.cc

Index: chrome/browser/renderer_host/out_of_memory_message_filter.cc
diff --git a/chrome/browser/renderer_host/out_of_memory_message_filter.cc b/chrome/browser/renderer_host/out_of_memory_message_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..10734b17b14c4771279ba1d1392332ea847ea82f
--- /dev/null
+++ b/chrome/browser/renderer_host/out_of_memory_message_filter.cc
@@ -0,0 +1,54 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/renderer_host/out_of_memory_message_filter.h"
+
+#include "chrome/browser/browser_thread.h"
+#include "chrome/browser/renderer_host/render_process_host.h"
+#include "chrome/common/render_messages.h"
+
+OutOfMemoryMessageFilter::OutOfMemoryMessageFilter(int process_id)
+    : process_id_(process_id) {
+}
+
+OutOfMemoryMessageFilter::~OutOfMemoryMessageFilter() {
+}
+
+bool OutOfMemoryMessageFilter::OnMessageReceived(const IPC::Message& message,
+                                                 bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(OutOfMemoryMessageFilter, message, *message_was_ok)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(ViewHostMsg_RenderProcessOutOfJSMemory,
+                                    OnRenderProcessOutOfMemory)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void OutOfMemoryMessageFilter::OnRenderProcessOutOfMemory(
+    IPC::Message* reply_msg) {
+  Send(reply_msg);
+
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      NewRunnableMethod(
+          this,
+          &OutOfMemoryMessageFilter::OnRenderProcessOutOfMemoryOnUIThread));
+}
+
+void OutOfMemoryMessageFilter::OnRenderProcessOutOfMemoryOnUIThread() {
+  RenderProcessHost* rph = RenderProcessHost::FromID(process_id_);
+  if (!rph)
+    return;
+
+  // Show OOM notification bar in all tabs sharing this render process.
+  RenderProcessHost::listeners_iterator iter = rph->ListenersIterator();
+  while (!iter.IsAtEnd()) {
+    const IPC::Channel::Listener* listener = iter.GetCurrentValue();
+    const_cast<IPC::Channel::Listener*>(listener)->OnMessageReceived(

[yurys, 2011/02/01 14:00:37]

I'd love to avoid const_cast here but I don't see another way to enumerate all
render views sharing the same render process here. Alternatively, we could use
NotificationService to notify corresponding tabs. I'm open to suggestions.

+        ViewHostMsg_JSOutOfMemory(iter.GetCurrentKey()));
+    iter.Advance();
+  }
+}
+