Adds EngineGeolocationFeature for Blimp Geolocation project.

blimp/engine/session/blimp_engine_session.cc

Index: blimp/engine/session/blimp_engine_session.cc
diff --git a/blimp/engine/session/blimp_engine_session.cc b/blimp/engine/session/blimp_engine_session.cc
index 70134b671f01cbcba85f928a93333bf16cd2911b..9e201049ce9178a5f818b71f1ec3281f9281dbc9 100644
--- a/blimp/engine/session/blimp_engine_session.cc
+++ b/blimp/engine/session/blimp_engine_session.cc
@@ -5,6 +5,7 @@
 #include "blimp/engine/session/blimp_engine_session.h"
 
 #include <string>
+#include <utility>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ -40,6 +41,8 @@
 #include "blimp/net/thread_pipe_manager.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/geolocation_delegate.h"
+#include "content/public/browser/geolocation_provider.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_view_host.h"
@@ -238,6 +241,8 @@ BlimpEngineSession::BlimpEngineSession(
   blob_channel_sender_ = base::WrapUnique(
       new BlobChannelSenderImpl(base::WrapUnique(new InMemoryBlobCache),
                                 std::move(helium_blob_delegate)));
+  content::GeolocationProvider::SetGeolocationDelegate(
+      GetGeolocationFeature()->CreateGeolocationDelegate());

[Wez, 2016/07/25 23:06:19]

nit: Please put a blank line before this, to make it obvious, visually, that
this is not related to the blob stuff immediately above. :)

[CJ, 2016/07/25 23:20:21]

Done.

 }
 
 BlimpEngineSession::~BlimpEngineSession() {
@@ -292,6 +297,10 @@ void BlimpEngineSession::Initialize() {
                  engine_config_->client_token()));
 }
 
+EngineGeolocationFeature* BlimpEngineSession::GetGeolocationFeature() {
+  return &geolocation_feature_;
+}
+
 void BlimpEngineSession::GetEnginePortForTesting(
     const GetPortCallback& callback) {
   content::BrowserThread::PostTaskAndReplyWithResult(
@@ -324,6 +333,9 @@ void BlimpEngineSession::RegisterFeatures() {
   render_widget_feature_.set_ime_message_sender(
       thread_pipe_manager_->RegisterFeature(BlimpMessage::kIme,
                                             &render_widget_feature_));
+  geolocation_feature_.set_outgoing_message_processor(
+      thread_pipe_manager_->RegisterFeature(BlimpMessage::kGeolocation,
+                                            &geolocation_feature_));
   blob_delegate_->set_outgoing_message_processor(
       thread_pipe_manager_->RegisterFeature(BlimpMessage::kBlobChannel,
                                             blob_delegate_));