Add a hang monitor for Pepper plugins

content/browser/ppapi_plugin_process_host.cc

Index: content/browser/ppapi_plugin_process_host.cc
diff --git a/content/browser/ppapi_plugin_process_host.cc b/content/browser/ppapi_plugin_process_host.cc
index 012536f1c9c8aa476820f66ed5c7d197451ad599..1aacae81c2f1e9dc52830b077f38591597c8a989 100644
--- a/content/browser/ppapi_plugin_process_host.cc
+++ b/content/browser/ppapi_plugin_process_host.cc
@@ -111,16 +111,14 @@ PpapiPluginProcessHost::PpapiPluginProcessHost(net::HostResolver* host_resolver)
     : filter_(new PepperMessageFilter(PepperMessageFilter::PLUGIN,
                                       host_resolver)),
       network_observer_(new PluginNetworkObserver(this)),
-      is_broker_(false),
-      process_id_(ChildProcessHostImpl::GenerateChildProcessUniqueId()) {
+      is_broker_(false) {
   process_.reset(new BrowserChildProcessHostImpl(
       content::PROCESS_TYPE_PPAPI_PLUGIN, this));
   process_->GetHost()->AddFilter(filter_.get());
 }
 
 PpapiPluginProcessHost::PpapiPluginProcessHost()
-    : is_broker_(true),
-      process_id_(ChildProcessHostImpl::GenerateChildProcessUniqueId()) {
+    : is_broker_(true) {
   process_.reset(new BrowserChildProcessHostImpl(
       content::PROCESS_TYPE_PPAPI_BROKER, this));
 }
@@ -210,7 +208,7 @@ void PpapiPluginProcessHost::RequestPluginChannel(Client* client) {
   if (Send(msg))
     sent_requests_.push(client);
   else
-    client->OnChannelOpened(base::kNullProcessHandle, IPC::ChannelHandle());
+    client->OnChannelOpened(base::kNullProcessHandle, IPC::ChannelHandle(), 0);
 }
 
 void PpapiPluginProcessHost::OnProcessLaunched() {
@@ -257,13 +255,13 @@ void PpapiPluginProcessHost::CancelRequests() {
            << "CancelRequests()";
   for (size_t i = 0; i < pending_requests_.size(); i++) {
     pending_requests_[i]->OnChannelOpened(base::kNullProcessHandle,
-                                          IPC::ChannelHandle());
+                                          IPC::ChannelHandle(), 0);
   }
   pending_requests_.clear();
 
   while (!sent_requests_.empty()) {
     sent_requests_.front()->OnChannelOpened(base::kNullProcessHandle,
-                                            IPC::ChannelHandle());
+                                            IPC::ChannelHandle(), 0);
     sent_requests_.pop();
   }
 }
@@ -295,5 +293,6 @@ void PpapiPluginProcessHost::OnRendererPluginChannelCreated(
   base::ProcessHandle renderers_plugin_handle = plugin_process;
 #endif
 
-  client->OnChannelOpened(renderers_plugin_handle, channel_handle);
+  client->OnChannelOpened(renderers_plugin_handle, channel_handle,
+                          process_->GetData().id);
 }