Fix header-guard naming convention in shell/. (#49006)

Part of landing #48903.

Some of these actually seem like potential owchy spots, i.e. `#ifndef FLUTTER_FLUTTER_H_`.

Author: matanlurey

shell/common/dl_op_spy.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef FLUTTER_DISPLAY_LIST_DL_OP_SPY_H_
-#define FLUTTER_DISPLAY_LIST_DL_OP_SPY_H_
+#ifndef FLUTTER_SHELL_COMMON_DL_OP_SPY_H_
+#define FLUTTER_SHELL_COMMON_DL_OP_SPY_H_
 
 #include "flutter/display_list/dl_op_receiver.h"
 #include "flutter/display_list/utils/dl_receiver_utils.h"
@@ -109,4 +109,4 @@ class DlOpSpy final : public virtual DlOpReceiver,
 
 }  // namespace flutter
 
-#endif  // FLUTTER_DISPLAY_LIST_DL_OP_SPY_H_
+#endif  // FLUTTER_SHELL_COMMON_DL_OP_SPY_H_

shell/common/engine.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SHELL_COMMON_ENGINE_H_
-#define SHELL_COMMON_ENGINE_H_
+#ifndef FLUTTER_SHELL_COMMON_ENGINE_H_
+#define FLUTTER_SHELL_COMMON_ENGINE_H_
 
 #include <memory>
 #include <string>
@@ -1039,4 +1039,4 @@ class Engine final : public RuntimeDelegate, PointerDataDispatcher::Delegate {
 
 }  // namespace flutter
 
-#endif  // SHELL_COMMON_ENGINE_H_
+#endif  // FLUTTER_SHELL_COMMON_ENGINE_H_

shell/common/platform_message_handler.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SHELL_COMMON_PLATFORM_MESSAGE_HANDLER_H_
-#define SHELL_COMMON_PLATFORM_MESSAGE_HANDLER_H_
+#ifndef FLUTTER_SHELL_COMMON_PLATFORM_MESSAGE_HANDLER_H_
+#define FLUTTER_SHELL_COMMON_PLATFORM_MESSAGE_HANDLER_H_
 
 #include <memory>
 
@@ -45,4 +45,4 @@ class PlatformMessageHandler {
 };
 }  // namespace flutter
 
-#endif  // SHELL_COMMON_PLATFORM_MESSAGE_HANDLER_H_
+#endif  // FLUTTER_SHELL_COMMON_PLATFORM_MESSAGE_HANDLER_H_

shell/common/platform_view.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMMON_PLATFORM_VIEW_H_
-#define COMMON_PLATFORM_VIEW_H_
+#ifndef FLUTTER_SHELL_COMMON_PLATFORM_VIEW_H_
+#define FLUTTER_SHELL_COMMON_PLATFORM_VIEW_H_
 
 #include <functional>
 #include <memory>
@@ -881,4 +881,4 @@ class PlatformView {
 
 }  // namespace flutter
 
-#endif  // COMMON_PLATFORM_VIEW_H_
+#endif  // FLUTTER_SHELL_COMMON_PLATFORM_VIEW_H_

shell/common/pointer_data_dispatcher.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef POINTER_DATA_DISPATCHER_H_
-#define POINTER_DATA_DISPATCHER_H_
+#ifndef FLUTTER_SHELL_COMMON_POINTER_DATA_DISPATCHER_H_
+#define FLUTTER_SHELL_COMMON_POINTER_DATA_DISPATCHER_H_
 
 #include "flutter/runtime/runtime_controller.h"
 #include "flutter/shell/common/animator.h"
@@ -174,4 +174,4 @@ using PointerDataDispatcherMaker =
 
 }  // namespace flutter
 
-#endif  // POINTER_DATA_DISPATCHER_H_
+#endif  // FLUTTER_SHELL_COMMON_POINTER_DATA_DISPATCHER_H_

shell/common/rasterizer.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SHELL_COMMON_RASTERIZER_H_
-#define SHELL_COMMON_RASTERIZER_H_
+#ifndef FLUTTER_SHELL_COMMON_RASTERIZER_H_
+#define FLUTTER_SHELL_COMMON_RASTERIZER_H_
 
 #include <memory>
 #include <optional>
@@ -735,4 +735,4 @@ class Rasterizer final : public SnapshotDelegate,
 
 }  // namespace flutter
 
-#endif  // SHELL_COMMON_RASTERIZER_H_
+#endif  // FLUTTER_SHELL_COMMON_RASTERIZER_H_

shell/common/shell.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SHELL_COMMON_SHELL_H_
-#define SHELL_COMMON_SHELL_H_
+#ifndef FLUTTER_SHELL_COMMON_SHELL_H_
+#define FLUTTER_SHELL_COMMON_SHELL_H_
 
 #include <functional>
 #include <mutex>
@@ -815,4 +815,4 @@ class Shell final : public PlatformView::Delegate,
 
 }  // namespace flutter
 
-#endif  // SHELL_COMMON_SHELL_H_
+#endif  // FLUTTER_SHELL_COMMON_SHELL_H_

shell/common/shell_test_external_view_embedder.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef FLUTTER_SHELL_TEST_EXTERNAL_VIEW_EMBEDDER_H_
-#define FLUTTER_SHELL_TEST_EXTERNAL_VIEW_EMBEDDER_H_
+#ifndef FLUTTER_SHELL_COMMON_SHELL_TEST_EXTERNAL_VIEW_EMBEDDER_H_
+#define FLUTTER_SHELL_COMMON_SHELL_TEST_EXTERNAL_VIEW_EMBEDDER_H_
 
 #include "flutter/flow/embedded_views.h"
 #include "flutter/fml/raster_thread_merger.h"
@@ -111,4 +111,4 @@ class ShellTestExternalViewEmbedder final : public ExternalViewEmbedder {
 
 }  // namespace flutter
 
-#endif  // FLUTTER_SHELL_TEST_EXTERNAL_VIEW_EMBEDDER_H_
+#endif  // FLUTTER_SHELL_COMMON_SHELL_TEST_EXTERNAL_VIEW_EMBEDDER_H_

shell/common/shell_test_platform_view.h

@@ -66,4 +66,4 @@ class ShellTestPlatformViewBuilder {
 }  // namespace testing
 }  // namespace flutter
 
-#endif  // FLUTTER_SHELL_COMMON_SHELL_TEST_PLATFORM_VIEW_GL_H_
+#endif  // FLUTTER_SHELL_COMMON_SHELL_TEST_PLATFORM_VIEW_H_

shell/common/snapshot_surface_producer.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SHELL_COMMON_SNAPSHOT_SURFACE_PRODUCER_H_
-#define SHELL_COMMON_SNAPSHOT_SURFACE_PRODUCER_H_
+#ifndef FLUTTER_SHELL_COMMON_SNAPSHOT_SURFACE_PRODUCER_H_
+#define FLUTTER_SHELL_COMMON_SNAPSHOT_SURFACE_PRODUCER_H_
 
 #include <memory>
 
@@ -19,4 +19,4 @@ class SnapshotSurfaceProducer {
 };
 
 }  // namespace flutter
-#endif  // SHELL_COMMON_SNAPSHOT_SURFACE_PRODUCER_H_
+#endif  // FLUTTER_SHELL_COMMON_SNAPSHOT_SURFACE_PRODUCER_H_