Add ClientNativePixmap multi-planar support.

ui/ozone/public/client_native_pixmap.h

Index: ui/ozone/public/client_native_pixmap.h
diff --git a/ui/ozone/public/client_native_pixmap.h b/ui/ozone/public/client_native_pixmap.h
index e7aa3615d84234327f847744057dbd2214203541..a94e34fb9fdb5e796f909412df24422924775ccb 100644
--- a/ui/ozone/public/client_native_pixmap.h
+++ b/ui/ozone/public/client_native_pixmap.h
@@ -16,9 +16,13 @@ class OZONE_EXPORT ClientNativePixmap {
  public:
   virtual ~ClientNativePixmap() {}
 
-  virtual void* Map() = 0;
+  // Map each plane in the client address space.
+  // Return false on error.
+  virtual bool Map() = 0;
   virtual void Unmap() = 0;
-  virtual void GetStride(int* stride) const = 0;
+
+  virtual void* GetMemoryAddress(size_t plane) const = 0;
+  virtual int GetStride(size_t plane) const = 0;
 };
 
 }  // namespace ui