Modify dactyloscoper to support more typed array variations.

This includes supporting MaybeShared and raw pointers in addition to
NotShared, and supporting all view types.

Bug: 973801
Change-Id: I6bf50dbda181ee33a47b12618601302eb50dba98
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2432813
Commit-Queue: Caleb Raitto <caraitto@chromium.org>
Reviewed-by: Nate Chapin <japhet@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811008}

third_party/blink/renderer/core/frame/dactyloscoper.cc

@@ -87,13 +87,12 @@ void Dactyloscoper::RecordDirectSurface(ExecutionContext* context,
 }
 
 // static
-void Dactyloscoper::RecordDirectSurface(
-    ExecutionContext* context,
-    WebFeature feature,
-    const NotShared<DOMFloat32Array>& buffer) {
+void Dactyloscoper::RecordDirectSurface(ExecutionContext* context,
+                                        WebFeature feature,
+                                        const DOMArrayBufferView* buffer) {
   if (!context || !IsStudyEnabled(feature))
     return;
-  if (buffer.IsNull() || buffer->lengthAsSizeT() == 0)
+  if (!buffer || buffer->byteLengthAsSizeT() == 0)
     return;
   IdentifiableTokenBuilder builder(
       base::make_span(static_cast<uint8_t*>(buffer->BaseAddress()),

third_party/blink/renderer/core/frame/dactyloscoper.h

@@ -42,10 +42,22 @@ class CORE_EXPORT Dactyloscoper {
                                   const Vector<String>&);
   static void RecordDirectSurface(ExecutionContext*,
                                   WebFeature,
-                                  const NotShared<DOMFloat32Array>&);
+                                  const DOMArrayBufferView*);
   static void RecordDirectSurface(ExecutionContext*,
                                   WebFeature,
                                   SVGStringListTearOff*);
+  static void RecordDirectSurface(
+      ExecutionContext* context,
+      WebFeature feature,
+      const NotShared<DOMArrayBufferView>& not_shared) {
+    Dactyloscoper::RecordDirectSurface(context, feature, not_shared.Get());
+  }
+  static void RecordDirectSurface(
+      ExecutionContext* context,
+      WebFeature feature,
+      const MaybeShared<DOMArrayBufferView>& maybe_shared) {
+    Dactyloscoper::RecordDirectSurface(context, feature, maybe_shared.Get());
+  }
 
   template <typename T>
   static void RecordDirectSurface(ExecutionContext* context,