gpu: Don't destroy the ui::PlatformEventSource too early

content/gpu/gpu_main.cc

 // Copyright (c) 2012 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 <stddef.h>
 #include <stdlib.h>
 
 #include <memory>
 #include <utility>
 
@@ skipping 183 matching lines @@
 
   logging::SetLogMessageHandler(GpuProcessLogMessageHandler);
 
   // We are experiencing what appear to be memory-stomp issues in the GPU
   // process. These issues seem to be impacting the message loop and listeners
   // registered to it. Create the message loop on the heap to guard against
   // this.
   // TODO(ericrk): Revisit this once we assess its impact on crbug.com/662802
   // and crbug.com/609252.
   std::unique_ptr<base::MessageLoop> main_message_loop;
+  std::unique_ptr<ui::PlatformEventSource> event_source;
   if (command_line.HasSwitch(switches::kHeadless)) {
     main_message_loop.reset(
         new base::MessageLoop(base::MessageLoop::TYPE_DEFAULT));
   } else {
 #if defined(OS_WIN)
     // OK to use default non-UI message loop because all GPU windows run on
     // dedicated thread.
     main_message_loop.reset(
         new base::MessageLoop(base::MessageLoop::TYPE_DEFAULT));
 #elif defined(USE_X11)
     // We need a UI loop so that we can grab the Expose events. See GLSurfaceGLX
     // and https://crbug.com/326995.
     main_message_loop.reset(new base::MessageLoop(base::MessageLoop::TYPE_UI));
-    std::unique_ptr<ui::PlatformEventSource> event_source =
-        ui::PlatformEventSource::CreateDefault();
+    event_source = ui::PlatformEventSource::CreateDefault();
 #elif defined(USE_OZONE) && defined(OZONE_X11)
     // If we might be running Ozone X11 we need a UI loop to grab Expose events.
     // See GLSurfaceGLX and https://crbug.com/326995.
     main_message_loop.reset(new base::MessageLoop(base::MessageLoop::TYPE_UI));
 #elif defined(USE_OZONE)
     main_message_loop.reset(
         new base::MessageLoop(base::MessageLoop::TYPE_DEFAULT));
 #elif defined(OS_LINUX)
 #error "Unsupported Linux platform."
 #elif defined(OS_MACOSX)
@@ skipping 126 matching lines @@
     return true;
   }
 
   return false;
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace.
 
 }  // namespace content