[warnings] Add Wsuggest-override and Wsuggest-destructor-override.

This CL adds the `-Wsuggest-override` and
`-Wsuggest-destructor-override` warnings and fixes up the identified
issues.

Change-Id: I0ec1303a822abc258ce34d3bf1900e37ade6a8dc
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/89561
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>

src/dawn/common/BUILD.gn

@@ -118,6 +118,8 @@ config("internal_config") {
       "-Wredundant-move",
       "-Wshadow-field",
       "-Wstrict-prototypes",
+      "-Wsuggest-destructor-override",
+      "-Wsuggest-override",
       "-Wtautological-unsigned-zero-compare",
       "-Wunreachable-code-aggressive",
       "-Wunused-but-set-variable",

src/dawn/native/AsyncTask.h

@@ -48,7 +48,7 @@ class AsyncTaskManager {
     class WaitableTask : public RefCounted {
       public:
         WaitableTask();
-        ~WaitableTask();
+        ~WaitableTask() override;
 
         AsyncTask asyncTask;
         AsyncTaskManager* taskManager;

src/dawn/native/CreatePipelineAsyncTask.h

@@ -34,7 +34,7 @@ struct FlatComputePipelineDescriptor;
 
 struct CreatePipelineAsyncCallbackTaskBase : CallbackTask {
     CreatePipelineAsyncCallbackTaskBase(std::string errorMessage, void* userData);
-    ~CreatePipelineAsyncCallbackTaskBase();
+    ~CreatePipelineAsyncCallbackTaskBase() override;
 
   protected:
     std::string mErrorMessage;

src/dawn/native/Device.h

@@ -60,7 +60,7 @@ using WGSLExtensionSet = std::unordered_set<std::string>;
 class DeviceBase : public RefCounted {
   public:
     DeviceBase(AdapterBase* adapter, const DeviceDescriptor* descriptor);
-    virtual ~DeviceBase();
+    ~DeviceBase() override;
 
     void HandleError(InternalErrorType type, const char* message);
 

src/dawn/native/d3d12/D3D11on12Util.h

@@ -34,7 +34,7 @@ class D3D11on12ResourceCacheEntry : public RefCounted {
     explicit D3D11on12ResourceCacheEntry(ComPtr<ID3D11On12Device> d3d11on12Device);
     D3D11on12ResourceCacheEntry(ComPtr<IDXGIKeyedMutex> d3d11on12Resource,
                                 ComPtr<ID3D11On12Device> d3d11on12Device);
-    ~D3D11on12ResourceCacheEntry();
+    ~D3D11on12ResourceCacheEntry() override;
 
     MaybeError AcquireKeyedMutex();
     void ReleaseKeyedMutex();

src/dawn/native/metal/CommandBufferMTL.h

@@ -48,7 +48,7 @@ class CommandBuffer final : public CommandBufferBase {
                                      const CommandBufferDescriptor* descriptor);
 
     CommandBuffer(CommandEncoder* encoder, const CommandBufferDescriptor* descriptor);
-    ~CommandBuffer();
+    ~CommandBuffer() override;
 
     MaybeError FillCommands(CommandRecordingContext* commandContext);
 

src/dawn/native/null/DeviceNull.cpp

@@ -89,7 +89,7 @@ BackendConnection* Connect(InstanceBase* instance) {
 }
 
 struct CopyFromStagingToBufferOperation : PendingOperation {
-    virtual void Execute() {
+    void Execute() override {
         destination->CopyFromStaging(staging, sourceOffset, destinationOffset, size);
     }
 

src/dawn/tests/unittests/validation/DeviceValidationTests.cpp

@@ -22,7 +22,7 @@ using ::testing::HasSubstr;
 
 class RequestDeviceValidationTest : public ValidationTest {
   protected:
-    void SetUp() {
+    void SetUp() override {
         DAWN_SKIP_TEST_IF(UsesWire());
         ValidationTest::SetUp();
     }