Revert "POSIX: Don't allow onunload handlers to hang a renderer forever."

This reverts commit r15025. Calling exit() on another thread meant
V8's destructor functions got called while another thread was still in
V8.

I might not have a better plan, but it's making a mess of the valgrind
builders so I'm reverting for now with an eye to landing again next
week.


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15095 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 0 insertions, 39 deletions

diff --git a/chrome/common/ipc_channel_proxy.cc b/chrome/common/ipc_channel_proxy.cc
index c43f01f..47aa89b 100644
--- a/chrome/common/ipc_channel_proxy.cc
+++ b/chrome/common/ipc_channel_proxy.cc
@@ -81,9 +81,6 @@ void ChannelProxy::Context::OnChannelConnected(int32 peer_pid) {
 
 // Called on the IPC::Channel thread
 void ChannelProxy::Context::OnChannelError() {
-  for (size_t i = 0; i < filters_.size(); ++i)
-    filters_[i]->OnChannelError();
-
   // See above comment about using listener_message_loop_ here.
   listener_message_loop_->PostTask(FROM_HERE, NewRunnableMethod(
       this, &Context::OnDispatchError));
diff --git a/chrome/common/ipc_channel_proxy.h b/chrome/common/ipc_channel_proxy.h
index 42cb865..2263ea6 100644
--- a/chrome/common/ipc_channel_proxy.h
+++ b/chrome/common/ipc_channel_proxy.h
@@ -64,10 +64,6 @@ class ChannelProxy : public Message::Sender {
     // have received the internal Hello message from the peer.
     virtual void OnChannelConnected(int32 peer_pid) {}
 
-    // Called when there is an error on the channel, typically that the channel
-    // has been closed.
-    virtual void OnChannelError() {}
-
     // Called to inform the filter that the IPC channel will be destroyed.
     // OnFilterRemoved is called immediately after this.
     virtual void OnChannelClosing() {}
diff --git a/chrome/renderer/render_thread.cc b/chrome/renderer/render_thread.cc
index 5b4dac1..26836ca 100644
--- a/chrome/renderer/render_thread.cc
+++ b/chrome/renderer/render_thread.cc
@@ -103,28 +103,6 @@ static WebAppCacheContext* CreateAppCacheContextForRenderer() {
   return new AppCacheContextImpl(RenderThread::current());
 }
 
-#if defined(OS_POSIX)
-class SuicideOnChannelErrorFilter : public IPC::ChannelProxy::MessageFilter {
-  void OnChannelError() {
-    // On POSIX, at least, one can install an unload handler which loops
-    // forever and leave behind a renderer process which eats 100% CPU forever.
-    //
-    // This is because the terminate signals (ViewMsg_ShouldClose and the error
-    // from the IPC channel) are routed to the main message loop but never
-    // processed (because that message loop is stuck in V8).
-    //
-    // One could make the browser SIGKILL the renderers, but that leaves open a
-    // large window where a browser failure (or a user, manually terminating
-    // the browser because "it's stuck") will leave behind a process eating all
-    // the CPU.
-    //
-    // So, we install a filter on the channel so that we can process this event
-    // here and kill the process.
-    exit(0);
-  }
-};
-#endif
-
 void RenderThread::Init() {
 #if defined(OS_WIN)
   // If you are running plugins in this thread you need COM active but in
@@ -146,11 +124,6 @@ void RenderThread::Init() {
   WebAppCacheContext::SetFactory(CreateAppCacheContextForRenderer);
   devtools_agent_filter_ = new DevToolsAgentFilter();
   AddFilter(devtools_agent_filter_.get());
-
-#if defined(OS_POSIX)
-  suicide_on_channel_error_filter_ = new SuicideOnChannelErrorFilter;
-  AddFilter(suicide_on_channel_error_filter_.get());
-#endif
 }
 
 void RenderThread::CleanUp() {
diff --git a/chrome/renderer/render_thread.h b/chrome/renderer/render_thread.h
index 44e20e9..d50fd96 100644
--- a/chrome/renderer/render_thread.h
+++ b/chrome/renderer/render_thread.h
@@ -160,11 +160,6 @@ class RenderThread : public RenderThreadBase,
 
   scoped_refptr<DevToolsAgentFilter> devtools_agent_filter_;
 
-#if defined(OS_POSIX)
-  scoped_refptr<IPC::ChannelProxy::MessageFilter>
-      suicide_on_channel_error_filter_;
-#endif
-
   // If true, then a GetPlugins call is allowed to rescan the disk.
   bool plugin_refresh_allowed_;