Remove unnecessary layer-violating include in gpu_memory_buffer_factory_io_surface

BUG=none

Review URL: https://codereview.chromium.org/1821883002

Cr-Commit-Position: refs/heads/master@{#382454}
diff --git a/content/common/gpu/gpu_memory_buffer_factory_io_surface.cc b/content/common/gpu/gpu_memory_buffer_factory_io_surface.cc
index 4db0fb06..b1f252b 100644
--- a/content/common/gpu/gpu_memory_buffer_factory_io_surface.cc
+++ b/content/common/gpu/gpu_memory_buffer_factory_io_surface.cc
@@ -7,7 +7,6 @@
 #include <vector>
 
 #include "base/logging.h"
-#include "content/common/gpu/client/gpu_memory_buffer_impl.h"
 #include "ui/gfx/buffer_format_util.h"
 #include "ui/gfx/mac/io_surface.h"
 #include "ui/gl/gl_image_io_surface.h"