Geolocation: extract ContentBrowserClient methods specific to Geolocation into a class

blimp/engine/app/blimp_content_browser_client.cc

Index: blimp/engine/app/blimp_content_browser_client.cc
diff --git a/blimp/engine/app/blimp_content_browser_client.cc b/blimp/engine/app/blimp_content_browser_client.cc
index 3c6ab5b12f0cbca56624ccd03df1c0253b746df6..18999b79683092bdb7db4f44f2fbe1e4b6c173c9 100644
--- a/blimp/engine/app/blimp_content_browser_client.cc
+++ b/blimp/engine/app/blimp_content_browser_client.cc
@@ -5,12 +5,35 @@
 #include "blimp/engine/app/blimp_content_browser_client.h"
 #include "blimp/engine/app/blimp_browser_main_parts.h"
 #include "blimp/engine/app/settings_manager.h"
+#include "blimp/engine/feature/geolocation/blimp_location_provider.h"
 #include "blimp/engine/mojo/blob_channel_service.h"
 #include "services/shell/public/cpp/interface_registry.h"
 
 namespace blimp {
 namespace engine {
 
+namespace {
+// A provider of services needed by Geolocation.
+class BlimpGeolocationDelegate : public content::GeolocationProvider::Delegate {
+ public:
+  BlimpGeolocationDelegate() = default;
+
+  bool UseNetworkLocationProviders() final { return false; }
+
+  content::LocationProvider* OverrideSystemLocationProvider() final {
+    if (!location_provider_)
+      location_provider_ = base::WrapUnique(new BlimpLocationProvider());
+    return location_provider_.get();
+  }
+
+ private:
+  std::unique_ptr<BlimpLocationProvider> location_provider_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlimpGeolocationDelegate);
+};
+
+}  // anonymous namespace
+
 BlimpContentBrowserClient::BlimpContentBrowserClient() {}
 
 BlimpContentBrowserClient::~BlimpContentBrowserClient() {}
@@ -39,16 +62,9 @@ BlimpBrowserContext* BlimpContentBrowserClient::GetBrowserContext() {
   return blimp_browser_main_parts_->GetBrowserContext();
 }
 
-content::LocationProvider*
-BlimpContentBrowserClient::OverrideSystemLocationProvider() {
-  if (!location_provider_) {
-    location_provider_ = base::WrapUnique(new BlimpLocationProvider());
-  }
-  return location_provider_.get();
-}
-
-bool BlimpContentBrowserClient::UseNetworkLocationProviders() {
-  return false;
+content::GeolocationProvider::Delegate*
+BlimpContentBrowserClient::CreateGeolocationDelegate() {
+  return new BlimpGeolocationDelegate();
 }
 
 void BlimpContentBrowserClient::ExposeInterfacesToRenderer(