content: Some code cleanup related to shared memory allocation.

content/renderer/media/renderer_gpu_video_accelerator_factories.cc

Index: content/renderer/media/renderer_gpu_video_accelerator_factories.cc
diff --git a/content/renderer/media/renderer_gpu_video_accelerator_factories.cc b/content/renderer/media/renderer_gpu_video_accelerator_factories.cc
index c37c3f12bd06cb0afbc9b60a52d3a5a9df2d370c..6f75ae3a7dc1dbec665a2401595c4af201439862 100644
--- a/content/renderer/media/renderer_gpu_video_accelerator_factories.cc
+++ b/content/renderer/media/renderer_gpu_video_accelerator_factories.cc
@@ -298,8 +298,8 @@ RendererGpuVideoAcceleratorFactories::GetGLContextLock() {
 
 std::unique_ptr<base::SharedMemory>
 RendererGpuVideoAcceleratorFactories::CreateSharedMemory(size_t size) {
-  std::unique_ptr<base::SharedMemory> mem(ChildThreadImpl::AllocateSharedMemory(
-      size, thread_safe_sender_.get(), nullptr));
+  std::unique_ptr<base::SharedMemory> mem(
+      ChildThreadImpl::AllocateSharedMemory(size));
   if (mem && !mem->Map(size))
     return nullptr;
   return mem;