Migrate impeller/**.h to header guards. (#48962)

Automatically generated by #48903.

Progress towards flutter/flutter#133415.

Author: matanlurey

impeller/aiks/aiks_context.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_
+#define FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_
 
 #include <memory>
 
@@ -51,3 +52,5 @@ class AiksContext {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_

impeller/aiks/aiks_playground.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_AIKS_PLAYGROUND_H_
+#define FLUTTER_IMPELLER_AIKS_AIKS_PLAYGROUND_H_
 
 #include "flutter/fml/macros.h"
 #include "impeller/aiks/aiks_context.h"
@@ -41,3 +42,5 @@ class AiksPlayground : public PlaygroundTest {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_AIKS_PLAYGROUND_H_

impeller/aiks/canvas.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_CANVAS_H_
+#define FLUTTER_IMPELLER_AIKS_CANVAS_H_
 
 #include <deque>
 #include <functional>
@@ -198,3 +199,5 @@ class Canvas {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_CANVAS_H_

impeller/aiks/canvas_recorder.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_CANVAS_RECORDER_H_
+#define FLUTTER_IMPELLER_AIKS_CANVAS_RECORDER_H_
 
 #include <cstdint>
 
@@ -303,3 +304,5 @@ class CanvasRecorder {
 #endif
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_CANVAS_RECORDER_H_

impeller/aiks/canvas_type.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_CANVAS_TYPE_H_
+#define FLUTTER_IMPELLER_AIKS_CANVAS_TYPE_H_
 
 #include "impeller/aiks/canvas.h"
 #include "impeller/aiks/canvas_recorder.h"
@@ -20,3 +21,5 @@ using CanvasType = Canvas;
 #endif
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_CANVAS_TYPE_H_

impeller/aiks/color_filter.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_COLOR_FILTER_H_
+#define FLUTTER_IMPELLER_AIKS_COLOR_FILTER_H_
 
 #include "impeller/entity/contents/filters/color_filter_contents.h"
 #include "impeller/geometry/color.h"
@@ -176,3 +177,5 @@ class ComposedColorFilter final : public ColorFilter {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_COLOR_FILTER_H_

impeller/aiks/color_source.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_COLOR_SOURCE_H_
+#define FLUTTER_IMPELLER_AIKS_COLOR_SOURCE_H_
 
 #include <functional>
 #include <memory>
@@ -103,3 +104,5 @@ class ColorSource {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_COLOR_SOURCE_H_

impeller/aiks/image.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_IMAGE_H_
+#define FLUTTER_IMPELLER_AIKS_IMAGE_H_
 
 #include <memory>
 
@@ -30,3 +31,5 @@ class Image {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_IMAGE_H_

impeller/aiks/image_filter.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_IMAGE_FILTER_H_
+#define FLUTTER_IMPELLER_AIKS_IMAGE_FILTER_H_
 
 #include "impeller/aiks/color_filter.h"
 #include "impeller/core/sampler_descriptor.h"
@@ -271,3 +272,5 @@ class LocalMatrixImageFilter : public ImageFilter {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_IMAGE_FILTER_H_

impeller/aiks/paint.h

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#pragma once
+#ifndef FLUTTER_IMPELLER_AIKS_PAINT_H_
+#define FLUTTER_IMPELLER_AIKS_PAINT_H_
 
 #include <memory>
 
@@ -106,3 +107,5 @@ struct Paint {
 };
 
 }  // namespace impeller
+
+#endif  // FLUTTER_IMPELLER_AIKS_PAINT_H_