Gate new MoveMagnifierToRect API on MagnifierNewFocusFollowing switch

Fixed: 1139200
Change-Id: I7f87a0d8dd9e5284525b256da86dfa4334af5de7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2478145
Commit-Queue: Josiah Krutz <josiahk@google.com>
Auto-Submit: Josiah Krutz <josiahk@google.com>
Reviewed-by: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818115}

chrome/browser/accessibility/accessibility_extension_api.cc

@@ -416,6 +416,10 @@ AccessibilityPrivateMoveMagnifierToRectFunction::Run() {
   std::unique_ptr<accessibility_private::MoveMagnifierToRect::Params> params =
       accessibility_private::MoveMagnifierToRect::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(params);
+  if (!::switches::
+          IsExperimentalAccessibilityMagnifierNewFocusFollowingEnabled()) {
+    return RespondNow(NoArguments());
+  }
   accessibility_private::ScreenRect rect = std::move(params->rect);
   gfx::Rect bounds(rect.left, rect.top, rect.width, rect.height);
 

ui/accessibility/accessibility_switches.cc

@@ -64,6 +64,11 @@ bool IsExperimentalAccessibilitySwitchAccessTextEnabled() {
       ::switches::kEnableExperimentalAccessibilitySwitchAccessText);
 }
 
+bool IsExperimentalAccessibilityMagnifierNewFocusFollowingEnabled() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      ::switches::kEnableExperimentalAccessibilityMagnifierNewFocusFollowing);
+}
+
 bool IsSwitchAccessPointScanningEnabled() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       ::switches::kEnableSwitchAccessPointScanning);

ui/accessibility/accessibility_switches.h

@@ -39,6 +39,11 @@ IsExperimentalAccessibilityLanguageDetectionDynamicEnabled();
 // Returns true if experimental accessibility Switch Access text is enabled.
 AX_BASE_EXPORT bool IsExperimentalAccessibilitySwitchAccessTextEnabled();
 
+// Returns true if experimental accessibility Magnifier new focus following is
+// enabled.
+AX_BASE_EXPORT bool
+IsExperimentalAccessibilityMagnifierNewFocusFollowingEnabled();
+
 #if defined(OS_WIN)
 AX_BASE_EXPORT extern const char kEnableExperimentalUIAutomation[];
 #endif