[NativeFS] Add use counters for new entry points.

Bug: 1099442
Change-Id: Id18e1bbc585577c82fc40cabba1ce387194be3de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2268881
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#782847}

third_party/blink/public/mojom/web_feature/web_feature.mojom

@@ -2673,6 +2673,11 @@ enum WebFeature {
   kInlineOverflowScrollWithInlineEndPadding = 3336,
   kCSSSelectorPseudoWebKitDetailsMarker = 3337,
   kSerialPortGetInfo = 3338,
+  kFileSystemPickerMethod = 3339,
+  kV8Window_ShowOpenFilePicker_Method = 3340,
+  kV8Window_ShowSaveFilePicker_Method = 3341,
+  kV8Window_ShowDirectoryPicker_Method = 3342,
+  kV8Window_GetOriginPrivateDirectory_Method = 3343,
 
   // Add new features immediately above this line. Don't change assigned
   // numbers of any item, and don't reuse removed slots.

third_party/blink/renderer/modules/native_file_system/global_native_file_system.cc

@@ -271,6 +271,8 @@ ScriptPromise GlobalNativeFileSystem::chooseFileSystemEntries(
     LocalDOMWindow& window,
     const ChooseFileSystemEntriesOptions* options,
     ExceptionState& exception_state) {
+  UseCounter::Count(window, WebFeature::kFileSystemPickerMethod);
+
   VerifyIsAllowedToShowFilePicker(window, exception_state);
   if (exception_state.HadException())
     return ScriptPromise();
@@ -292,6 +294,8 @@ ScriptPromise GlobalNativeFileSystem::showOpenFilePicker(
     LocalDOMWindow& window,
     const OpenFilePickerOptions* options,
     ExceptionState& exception_state) {
+  UseCounter::Count(window, WebFeature::kFileSystemPickerMethod);
+
   Vector<mojom::blink::ChooseFileSystemEntryAcceptsOptionPtr> accepts;
   if (options->hasTypes())
     accepts = ConvertAccepts(options->types(), exception_state);
@@ -322,6 +326,8 @@ ScriptPromise GlobalNativeFileSystem::showSaveFilePicker(
     LocalDOMWindow& window,
     const SaveFilePickerOptions* options,
     ExceptionState& exception_state) {
+  UseCounter::Count(window, WebFeature::kFileSystemPickerMethod);
+
   Vector<mojom::blink::ChooseFileSystemEntryAcceptsOptionPtr> accepts;
   if (options->hasTypes())
     accepts = ConvertAccepts(options->types(), exception_state);
@@ -349,6 +355,8 @@ ScriptPromise GlobalNativeFileSystem::showDirectoryPicker(
     LocalDOMWindow& window,
     const DirectoryPickerOptions* options,
     ExceptionState& exception_state) {
+  UseCounter::Count(window, WebFeature::kFileSystemPickerMethod);
+
   VerifyIsAllowedToShowFilePicker(window, exception_state);
   if (exception_state.HadException())
     return ScriptPromise();

third_party/blink/renderer/modules/native_file_system/window_native_file_system.idl

@@ -13,16 +13,16 @@
     Promise<(FileSystemHandle or sequence<FileSystemHandle>)>
         chooseFileSystemEntries(optional ChooseFileSystemEntriesOptions options = {});
 
-    [CallWith=ScriptState, RaisesException]
+    [CallWith=ScriptState, RaisesException, Measure]
     Promise<sequence<FileSystemFileHandle>> showOpenFilePicker(
         optional OpenFilePickerOptions options = {});
-    [CallWith=ScriptState, RaisesException]
+    [CallWith=ScriptState, RaisesException, Measure]
     Promise<FileSystemFileHandle> showSaveFilePicker(
         optional SaveFilePickerOptions options = {});
-    [CallWith=ScriptState, RaisesException]
+    [CallWith=ScriptState, RaisesException, Measure]
     Promise<FileSystemDirectoryHandle> showDirectoryPicker(
         optional DirectoryPickerOptions options = {});
 
-    [CallWith=ScriptState, RaisesException]
+    [CallWith=ScriptState, RaisesException, Measure]
     Promise<FileSystemDirectoryHandle> getOriginPrivateDirectory();
 };

tools/metrics/histograms/enums.xml

@@ -28129,6 +28129,11 @@ Called by update_use_counter_feature_enum.py.-->
   <int value="3336" label="InlineOverflowScrollWithInlineEndPadding"/>
   <int value="3337" label="CSSSelectorPseudoWebKitDetailsMarker"/>
   <int value="3338" label="SerialPortGetInfo"/>
+  <int value="3339" label="FileSystemPickerMethod"/>
+  <int value="3340" label="V8Window_ShowOpenFilePicker_Method"/>
+  <int value="3341" label="V8Window_ShowSaveFilePicker_Method"/>
+  <int value="3342" label="V8Window_ShowDirectoryPicker_Method"/>
+  <int value="3343" label="V8Window_GetOriginPrivateDirectory_Method"/>
 </enum>
 
 <enum name="FeaturePolicyAllowlistType">