Revert of Adding status to swap complete

content/common/gpu/image_transport_surface_fbo_mac.mm

Index: content/common/gpu/image_transport_surface_fbo_mac.mm
diff --git a/content/common/gpu/image_transport_surface_fbo_mac.mm b/content/common/gpu/image_transport_surface_fbo_mac.mm
index 102a6b306f898e90f99aade538b73ce88b854227..f1aa838a778393c4bd5e4150e97b55663520b898 100644
--- a/content/common/gpu/image_transport_surface_fbo_mac.mm
+++ b/content/common/gpu/image_transport_surface_fbo_mac.mm
@@ -169,10 +169,9 @@
   }
 }
 
-gfx::SwapResult ImageTransportSurfaceFBO::SwapBuffers() {
+bool ImageTransportSurfaceFBO::SwapBuffers() {
   TRACE_EVENT0("gpu", "ImageTransportSurfaceFBO::SwapBuffers");
-  return SwapBuffersInternal() ? gfx::SwapResult::SWAP_ACK
-                               : gfx::SwapResult::SWAP_FAILED;
+  return SwapBuffersInternal();
 }
 
 bool ImageTransportSurfaceFBO::SwapBuffersInternal() {
@@ -209,13 +208,10 @@
     context_->share_group()->SetRendererID(renderer_id);
 }
 
-gfx::SwapResult ImageTransportSurfaceFBO::PostSubBuffer(int x,
-                                                        int y,
-                                                        int width,
-                                                        int height) {
+bool ImageTransportSurfaceFBO::PostSubBuffer(
+    int x, int y, int width, int height) {
   TRACE_EVENT0("gpu", "ImageTransportSurfaceFBO::PostSubBuffer");
-  return SwapBuffersInternal() ? gfx::SwapResult::SWAP_ACK
-                               : gfx::SwapResult::SWAP_FAILED;
+  return SwapBuffersInternal();
 }
 
 bool ImageTransportSurfaceFBO::SupportsPostSubBuffer() {