Minor fixes for libstdc++ 15 (#178601)

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*Replace this paragraph with a description of what this PR is changing
or adding, and why. Consider including before/after screenshots.*
This adds some includes and changes an API in an internal tool to use
`std::string` instead of `std::string_view` for a path, fixing builds
with libstdc++ 15

*List which issues are fixed by this PR. You must list at least one
issue. An issue is not required if the PR fixes something trivial like a
typo.*

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engine/src/flutter/display_list/dl_storage.h

@@ -5,6 +5,7 @@
 #ifndef FLUTTER_DISPLAY_LIST_DL_STORAGE_H_
 #define FLUTTER_DISPLAY_LIST_DL_STORAGE_H_
 
+#include <cstdint>
 #include <memory>
 
 #include "flutter/fml/logging.h"

engine/src/flutter/display_list/dl_text.h

@@ -5,6 +5,8 @@
 #ifndef FLUTTER_DISPLAY_LIST_DL_TEXT_H_
 #define FLUTTER_DISPLAY_LIST_DL_TEXT_H_
 
+#include <memory>
+
 #include "flutter/display_list/geometry/dl_geometry_types.h"
 
 namespace impeller {

engine/src/flutter/fml/synchronization/semaphore.h

@@ -5,6 +5,7 @@
 #ifndef FLUTTER_FML_SYNCHRONIZATION_SEMAPHORE_H_
 #define FLUTTER_FML_SYNCHRONIZATION_SEMAPHORE_H_
 
+#include <cstdint>
 #include <memory>
 
 #include "flutter/fml/macros.h"

engine/src/flutter/impeller/renderer/backend/gles/handle_gles.h

@@ -5,6 +5,7 @@
 #ifndef FLUTTER_IMPELLER_RENDERER_BACKEND_GLES_HANDLE_GLES_H_
 #define FLUTTER_IMPELLER_RENDERER_BACKEND_GLES_HANDLE_GLES_H_
 
+#include <cstdint>
 #include <optional>
 #include <sstream>
 #include <string>

engine/src/flutter/impeller/typographer/font.h

@@ -5,6 +5,7 @@
 #ifndef FLUTTER_IMPELLER_TYPOGRAPHER_FONT_H_
 #define FLUTTER_IMPELLER_TYPOGRAPHER_FONT_H_
 
+#include <cstdint>
 #include <memory>
 
 #include "fml/hash_combine.h"

engine/src/flutter/shell/platform/common/client_wrapper/include/flutter/binary_messenger.h

@@ -5,6 +5,7 @@
 #ifndef FLUTTER_SHELL_PLATFORM_COMMON_CLIENT_WRAPPER_INCLUDE_FLUTTER_BINARY_MESSENGER_H_
 #define FLUTTER_SHELL_PLATFORM_COMMON_CLIENT_WRAPPER_INCLUDE_FLUTTER_BINARY_MESSENGER_H_
 
+#include <cstdint>
 #include <functional>
 #include <string>
 

engine/src/flutter/tools/licenses_cpp/src/filter.cc

@@ -6,7 +6,7 @@
 #include <fstream>
 #include "third_party/abseil-cpp/absl/strings/str_cat.h"
 
-absl::StatusOr<Filter> Filter::Open(std::string_view path) {
+absl::StatusOr<Filter> Filter::Open(const std::string& path) {
   std::ifstream input;
   input.open(path);
   absl::StatusOr<Filter> result = Open(input);

engine/src/flutter/tools/licenses_cpp/src/filter.h

@@ -16,7 +16,7 @@
 /// This is used for things like the include.txt and exclude.txt.
 class Filter {
  public:
-  static absl::StatusOr<Filter> Open(std::string_view path);
+  static absl::StatusOr<Filter> Open(const std::string& path);
 
   static absl::StatusOr<Filter> Open(std::istream& input);