Show the Android Location Settings Dialog when sites want permission.

chrome/browser/android/location_settings.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #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;
 }
 
 // This class determines whether Chrome can access the device's location,
 // i.e. whether location is enabled system-wide on the device.
 class LocationSettings {
  public:
   virtual ~LocationSettings() {}
 
-  // Returns true if:
-  //  - Location is enabled system-wide (in Android settings)
-  //  - The necessary location permission are granted to Chrome, or if Chrome
-  //    still has the ability to request the permissions to be granted.
-  virtual bool CanSitesRequestLocationPermission(
+  // Returns true if Chrome has location permission.
+  virtual bool HasAndroidLocationPermission() = 0;
+
+  // Returns true if Chrome can prompt to get location permission.
+  virtual bool CanPromptForAndroidLocationPermission(
       content::WebContents* web_contents) = 0;
 
+  // Returns true if the system location is enabled.
+  virtual bool IsSystemLocationSettingEnabled() = 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;
 
@@ skipping 10 matching lines @@
   // 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_