Stubs for triggering the LSD in Clank

chrome/browser/android/location_settings.h

Index: chrome/browser/android/location_settings.h
diff --git a/chrome/browser/android/location_settings.h b/chrome/browser/android/location_settings.h
index 5d7fa7ec9c42059e31453f18fd37c1ab01fa0f2a..5dc407f1f6d6d6d79ca424d8790f4ddb9ac77b4c 100644
--- a/chrome/browser/android/location_settings.h
+++ b/chrome/browser/android/location_settings.h
@@ -5,7 +5,10 @@
 #ifndef CHROME_BROWSER_ANDROID_LOCATION_SETTINGS_H_
 #define CHROME_BROWSER_ANDROID_LOCATION_SETTINGS_H_
 
+#include "base/callback.h"
 #include "base/macros.h"
+#include "components/location/android/location_settings_dialog_context.h"
+#include "components/location/android/location_settings_dialog_outcome.h"
 
 namespace content {
 class WebContents;
@@ -23,6 +26,34 @@ class LocationSettings {
   //    still has the ability to request the permissions to be granted.
   virtual bool CanSitesRequestLocationPermission(
       content::WebContents* web_contents) = 0;
+
+  // Returns true iff a prompt can be triggered to ask the user to turn on the
+  // system location setting on their device.
+  // In particular, returns false if the system location setting is already
+  // enabled or if some of the features required to trigger a system location
+  // setting prompt are not available.
+  virtual bool CanPromptToEnableSystemLocationSetting() = 0;
+
+  typedef base::OnceCallback<void(LocationSettingsDialogOutcome)>
+      LocationSettingsDialogOutcomeCallback;
+
+  // Triggers a prompt to ask the user to turn on the system location setting on
+  // their device, and returns the outcome of the prompt via a callback.
+  //
+  // The prompt will be triggered in the activity of the web contents.
+  //
+  // The callback is guaranteed to be called unless the user never replies to
+  // the prompt dialog, which in practice happens very infrequently since the
+  // dialog is modal.
+  //
+  // The callback may be invoked a long time after this method has returned.
+  // If you need to access in the callback an object that is not owned by the
+  // callback, you should ensure that the object has not been destroyed before
+  // accessing it to prevent crashes, e.g. by using weak pointer semantics.
+  virtual void PromptToEnableSystemLocationSetting(
+      const LocationSettingsDialogContext prompt_context,
+      content::WebContents* web_contents,
+      LocationSettingsDialogOutcomeCallback callback) = 0;
 };
 
 #endif  // CHROME_BROWSER_ANDROID_LOCATION_SETTINGS_H_