Make sudden termination into a counter....

chrome/renderer/renderer_webkitclient_impl.cc

 // Copyright (c) 2009 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/renderer/renderer_webkitclient_impl.h"
 
 #if defined(USE_SYSTEM_SQLITE)
 #include <sqlite3.h>
 #else
 #include "third_party/sqlite/preprocessed/sqlite3.h"
@@ skipping 114 matching lines @@
     DnsPrefetchCString(hostname_utf8.data(), hostname_utf8.length());
   }
 }
 
 WebString RendererWebKitClientImpl::defaultLocale() {
   // TODO(darin): Eliminate this webkit_glue call.
   return WideToUTF16(webkit_glue::GetWebKitLocale());
 }
 
 void RendererWebKitClientImpl::suddenTerminationChanged(bool enabled) {
+  if (enabled) {
+    // We should not get more enables than disables, but we want it to be a
+    // non-fatal error if it does happen.
+    DCHECK_GT(sudden_termination_disables_, 0);
+    sudden_termination_disables_ = std::max(--sudden_termination_disables_, 0);
+    if (sudden_termination_disables_ != 0)
+      return;
+  } else {
+    sudden_termination_disables_++;
+    if (sudden_termination_disables_ != 1)
+      return;
+  }
+
   RenderThread* thread = RenderThread::current();
   if (thread)  // NULL in unittests.
     thread->Send(new ViewHostMsg_SuddenTerminationChanged(enabled));
 }
 
 WebStorageNamespace* RendererWebKitClientImpl::createLocalStorageNamespace(
     const WebString& path) {
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSingleProcess))
     return WebStorageNamespace::createLocalStorageNamespace(path);
   // The browser process decides the path, so ignore that param.
@@ skipping 149 matching lines @@
 long long RendererWebKitClientImpl::databaseGetFileSize(
   const WebString& file_name) {
   DBMessageFilter* db_message_filter = DBMessageFilter::GetInstance();
   int message_id = db_message_filter->GetUniqueID();
   return db_message_filter->SendAndWait(
     new ViewHostMsg_DatabaseGetFileSize(
       FilePath(webkit_glue::WebStringToFilePathString(file_name)),
       message_id),
     message_id, 0LL);
 }