Add HttpProtocolHandler and convert everything to use it

net/url_request/url_request_unittest.cc

Index: net/url_request/url_request_unittest.cc
diff --git a/net/url_request/url_request_unittest.cc b/net/url_request/url_request_unittest.cc
index 334f32859430d9de58a8475ff2aca67126f13f6d..18943f801a67790341f501cdf4c46be44aa820f8 100644
--- a/net/url_request/url_request_unittest.cc
+++ b/net/url_request/url_request_unittest.cc
@@ -96,6 +96,7 @@
 #include "net/test/spawned_test_server/spawned_test_server.h"
 #include "net/test/url_request/url_request_failed_job.h"
 #include "net/url_request/data_protocol_handler.h"
+#include "net/url_request/http_protocol_handler.h"
 #include "net/url_request/static_http_user_agent_settings.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_filter.h"
@@ -715,8 +716,9 @@ class URLRequestTest : public PlatformTest {
   URLRequestTest() : default_context_(true) {
     default_context_.set_network_delegate(&default_network_delegate_);
     default_context_.set_net_log(&net_log_);
-    job_factory_impl_ = new URLRequestJobFactoryImpl();
-    job_factory_.reset(job_factory_impl_);
+    job_factory_impl_ =
+        URLRequestJobFactoryImpl::CreateWithDefaultProtocolHandlers().release();
+    job_factory_ = base::WrapUnique(job_factory_impl_);

[mmenke, 2016/04/22 18:37:53]

Anything we do here is a bit funky, but rather than release + WrapUnique, let's
just put a std::unique_ptr<URLRequestJobFactoryImpl> on the stack, set
job_factory_impl_, and then move it over to job_factory_.

[mgersh, 2016/04/22 20:27:15]

Done.

   }
 
   ~URLRequestTest() override {
@@ -734,6 +736,7 @@ class URLRequestTest : public PlatformTest {
   virtual void SetUpFactory() {
     job_factory_impl_->SetProtocolHandler(
         "data", base::WrapUnique(new DataProtocolHandler));
+
 #if !defined(DISABLE_FILE_SUPPORT)
     job_factory_impl_->SetProtocolHandler(
         "file", base::WrapUnique(new FileProtocolHandler(