Add a bunch of CHECKs to RenderViewHost trying to track down a crash.

chrome/browser/renderer_host/render_view_host.cc

Index: chrome/browser/renderer_host/render_view_host.cc
diff --git a/chrome/browser/renderer_host/render_view_host.cc b/chrome/browser/renderer_host/render_view_host.cc
index 8072eb24e47aeae040961003b4b6f167aad695ae..a3f4314d2dc3ef8ed772af4934e6b908dae92b43 100644
--- a/chrome/browser/renderer_host/render_view_host.cc
+++ b/chrome/browser/renderer_host/render_view_host.cc
@@ -112,6 +112,12 @@ RenderViewHost::RenderViewHost(SiteInstance* instance,
     modal_dialog_event = new base::WaitableEvent(true, false);
 
   modal_dialog_event_.reset(modal_dialog_event);
+
+  // TODO(mpcomplete): remove this notification (and registrar) when we figure
+  // out why we're crashing on process()->Init().
+  // http://code.google.com/p/chromium/issues/detail?id=15607
+  registrar_.Add(this, NotificationType::RENDERER_PROCESS_TERMINATED,
+                 NotificationService::AllSources());
 }
 
 RenderViewHost::~RenderViewHost() {
@@ -129,8 +135,32 @@ RenderViewHost::~RenderViewHost() {
       NotificationService::NoDetails());
 }
 
+void RenderViewHost::Observe(NotificationType type,
+                             const NotificationSource& source,
+                             const NotificationDetails& details) {
+  DCHECK(type == NotificationType::RENDERER_PROCESS_TERMINATED);
+  RenderProcessHost* rph = Source<RenderProcessHost>(source).ptr();
+  if (rph == process()) {
+    // Try to get some debugging information on the stack.
+    size_t num_hosts = RenderProcessHost::size();
+    bool no_listeners = rph->listeners_begin() == rph->listeners_end();
+    bool live_instance = site_instance() != NULL;
+    CHECK(live_instance);
+    bool live_process = site_instance()->GetProcess() != NULL;
+    bool same_process = site_instance()->GetProcess() == rph;
+    CHECK(no_listeners);
+    CHECK(live_process);
+    CHECK(same_process);
+    CHECK(num_hosts > 0);
+    CHECK(false) << "RenderViewHost should outlive its RenderProcessHost.";
+  }
+}
+
 bool RenderViewHost::CreateRenderView() {
   DCHECK(!IsRenderViewLive()) << "Creating view twice";
+  CHECK(process());
+  CHECK(process()->listeners_begin() != process()->listeners_end()) <<
+      "Our process should have us as a listener.";
 
   // The process may (if we're sharing a process with another host that already
   // initialized it) or may not (we have our own process or the old process