[sensors][permission] Add new permission types in permission module.

third_party/WebKit/Source/modules/permissions/Permissions.cpp

Index: third_party/WebKit/Source/modules/permissions/Permissions.cpp
diff --git a/third_party/WebKit/Source/modules/permissions/Permissions.cpp b/third_party/WebKit/Source/modules/permissions/Permissions.cpp
index 986ce16e2f7cd2dc9465316e675ae823d9ec4c13..1f196450f23f61a8251467004ea10538210f9900 100644
--- a/third_party/WebKit/Source/modules/permissions/Permissions.cpp
+++ b/third_party/WebKit/Source/modules/permissions/Permissions.cpp
@@ -21,6 +21,7 @@
 #include "modules/permissions/PermissionDescriptor.h"
 #include "modules/permissions/PermissionStatus.h"
 #include "modules/permissions/PermissionUtils.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "platform/wtf/Functional.h"
 #include "platform/wtf/NotFound.h"
 #include "platform/wtf/PtrUtil.h"
@@ -91,6 +92,16 @@ PermissionDescriptorPtr ParsePermission(ScriptState* script_state,
   }
   if (name == "background-sync")
     return CreatePermissionDescriptor(PermissionName::BACKGROUND_SYNC);
+  // TODO(riju): Remove runtime flag check when Generic Sensor feature is
+  // stable.
+  if (name == "ambient-light-sensor" || name == "accelerometer" ||
+      name == "gyroscope" || name == "magnetometer") {
+    if (!RuntimeEnabledFeatures::SensorEnabled()) {
+      exception_state.ThrowTypeError("GenericSensor flag is not enabled.");
+      return nullptr;
+    }
+    return CreatePermissionDescriptor(PermissionName::SENSORS);
+  }
 
   return nullptr;
 }