Add a flag to disable GamePad API: Returns an empty list of devices without generating javascript exceptions (#1948)

build/patches/Add-a-flag-to-disable-GamePad-API.patch

@@ -10,8 +10,8 @@ License: GPL-2.0-or-later - https://spdx.org/licenses/GPL-2.0-or-later.html
  .../about_flags_cc/Add-a-flag-to-disable-GamePad-API.inc  | 7 +++++++
  device/gamepad/public/cpp/gamepad_features.cc             | 8 ++++++++
  device/gamepad/public/cpp/gamepad_features.h              | 2 ++
- .../blink/renderer/modules/gamepad/navigator_gamepad.cc   | 7 +++++++
- 6 files changed, 28 insertions(+), 2 deletions(-)
+ .../blink/renderer/modules/gamepad/navigator_gamepad.cc   | 6 ++++++
+ 6 files changed, 27 insertions(+), 2 deletions(-)
  create mode 100644 cromite_flags/chrome/browser/about_flags_cc/Add-a-flag-to-disable-GamePad-API.inc
 
 diff --git a/chrome/browser/flag-metadata.json b/chrome/browser/flag-metadata.json
@@ -94,18 +94,17 @@ diff --git a/third_party/blink/renderer/modules/gamepad/navigator_gamepad.cc b/t
  #include "third_party/blink/public/common/privacy_budget/identifiability_metric_builder.h"
  #include "third_party/blink/public/common/privacy_budget/identifiability_study_settings.h"
  #include "third_party/blink/public/mojom/frame/user_activation_notification_type.mojom-blink.h"
-@@ -114,6 +115,10 @@ void RecordGamepadsForIdentifiabilityStudy(
+@@ -114,6 +115,9 @@ void RecordGamepadsForIdentifiabilityStudy(
  HeapVector<Member<Gamepad>> NavigatorGamepad::getGamepads(
      Navigator& navigator,
      ExceptionState& exception_state) {
 +  if (::features::IsRestrictGamepadAccessEnabled()) {
-+    exception_state.ThrowSecurityError("Access to the feature \"gamepad\" is denied");
 +    return HeapVector<Member<Gamepad>>();
 +  }
    if (!navigator.DomWindow()) {
      // Using an existing NavigatorGamepad if one exists, but don't create one
      // for a detached window, as its subclasses depend on a non-null window.
-@@ -420,6 +425,8 @@ void NavigatorGamepad::SampleAndCompareGamepadState() {
+@@ -420,6 +424,8 @@ void NavigatorGamepad::SampleAndCompareGamepadState() {
  
  void NavigatorGamepad::DispatchGamepadEvent(const AtomicString& event_name,
                                              Gamepad* gamepad) {