Cleanup shared memory handling in DesktopCapturer interface.

webrtc/modules/desktop_capture/cropping_window_capturer.cc

Index: webrtc/modules/desktop_capture/cropping_window_capturer.cc
diff --git a/webrtc/modules/desktop_capture/cropping_window_capturer.cc b/webrtc/modules/desktop_capture/cropping_window_capturer.cc
index 1e37e782ffd1e96f8b2bd96ab20ca0397dc9ca4a..7aab7f8e3c07fc4b0620d920ff7a10c5dea9c087 100644
--- a/webrtc/modules/desktop_capture/cropping_window_capturer.cc
+++ b/webrtc/modules/desktop_capture/cropping_window_capturer.cc
@@ -31,6 +31,11 @@ void CroppingWindowCapturer::Start(DesktopCapturer::Callback* callback) {
   window_capturer_->Start(callback);
 }
 
+void CroppingWindowCapturer::SetSharedMemoryFactory(
+    rtc::scoped_ptr<SharedMemoryFactory> shared_memory_factory) {
+  window_capturer_->SetSharedMemoryFactory(std::move(shared_memory_factory));
+}
+
 void CroppingWindowCapturer::Capture(const DesktopRegion& region) {
   if (ShouldUseScreenCapturer()) {
     if (!screen_capturer_.get()) {
@@ -69,10 +74,6 @@ bool CroppingWindowCapturer::BringSelectedWindowToFront() {
   return window_capturer_->BringSelectedWindowToFront();
 }
 
-SharedMemory* CroppingWindowCapturer::CreateSharedMemory(size_t size) {
-  return callback_->CreateSharedMemory(size);
-}
-
 void CroppingWindowCapturer::OnCaptureCompleted(DesktopFrame* frame) {
   rtc::scoped_ptr<DesktopFrame> screen_frame(frame);