Revert of Add ClientNativePixmap multi-planar support.

ui/gfx/native_pixmap_handle.h

Index: ui/gfx/native_pixmap_handle.h
diff --git a/ui/gfx/native_pixmap_handle.h b/ui/gfx/native_pixmap_handle.h
index ceb5242379fe57a5107d4e2d1e49cd918b2497a7..767951b7cb1f44a6ebbceb30c9ec490d34504de4 100644
--- a/ui/gfx/native_pixmap_handle.h
+++ b/ui/gfx/native_pixmap_handle.h
@@ -5,7 +5,7 @@
 #ifndef UI_GFX_NATIVE_PIXMAP_HANDLE_H_
 #define UI_GFX_NATIVE_PIXMAP_HANDLE_H_
 
-#include <stddef.h>
+#include <stdint.h>
 #include <vector>
 
 #include "ui/gfx/gfx_export.h"
@@ -20,7 +20,7 @@
 // buffer. More fields can be added if they are plane specific.
 struct GFX_EXPORT NativePixmapPlane {
   NativePixmapPlane();
-  NativePixmapPlane(int stride, int offset, size_t size, uint64_t modifier);
+  NativePixmapPlane(int stride, int offset, uint64_t modifier);
   NativePixmapPlane(const NativePixmapPlane& other);
   ~NativePixmapPlane();
 
@@ -28,9 +28,6 @@
   // a memory mapping. One per plane per entry.
   int stride;
   int offset;
-  // Size in bytes of the plane.
-  // This is necessary to map the buffers.
-  size_t size;
   // The modifier is retrieved from GBM library and passed to EGL driver.
   // Generally it's platform specific, and we don't need to modify it in
   // Chromium code. Also one per plane per entry.