Refactor to make BlimpLocationProvider accessible to content layer.

blimp/engine/app/blimp_content_browser_client.h

Index: blimp/engine/app/blimp_content_browser_client.h
diff --git a/blimp/engine/app/blimp_content_browser_client.h b/blimp/engine/app/blimp_content_browser_client.h
index 936d1267fe775b43ec797bf0efc7df7077ba0861..24e3896ccadccbf6883206a3b38b877db34f0946 100644
--- a/blimp/engine/app/blimp_content_browser_client.h
+++ b/blimp/engine/app/blimp_content_browser_client.h
@@ -31,16 +31,16 @@ class BlimpContentBrowserClient : public content::ContentBrowserClient {
                            content::WebPreferences* prefs) override;
   void RegisterRenderProcessMojoServices(
       content::ServiceRegistry* registry) override;
+  content::LocationProvider* OverrideSystemLocationProvider() override;
+  bool UseNetworkLocationProviders() override;
 
   BlimpBrowserContext* GetBrowserContext();
 
-  content::LocationProvider* SoleLocationProvider() override;
-
  private:
   // Owned by BrowserMainLoop
   BlimpBrowserMainParts* blimp_browser_main_parts_ = nullptr;
 
-  BlimpLocationProvider location_provider_;
+  std::unique_ptr<BlimpLocationProvider> location_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpContentBrowserClient);
 };