Blimp: Add BlobChannel Helium messages and delegate impls.

blimp/net/BUILD.gn

Index: blimp/net/BUILD.gn
diff --git a/blimp/net/BUILD.gn b/blimp/net/BUILD.gn
index eaa89de6076b6ce24d32eb796beb541b115ab9a1..7b96c1cae21346205cafcf62b6f1eb2f60ed389a 100644
--- a/blimp/net/BUILD.gn
+++ b/blimp/net/BUILD.gn
@@ -29,6 +29,10 @@ component("net") {
     "blob_channel/blob_channel_receiver.h",
     "blob_channel/blob_channel_sender.cc",
     "blob_channel/blob_channel_sender.h",
+    "blob_channel/helium_blob_receiver_delegate.cc",
+    "blob_channel/helium_blob_receiver_delegate.h",
+    "blob_channel/helium_blob_sender_delegate.cc",
+    "blob_channel/helium_blob_sender_delegate.h",
     "browser_connection_handler.cc",
     "browser_connection_handler.h",
     "client_connection_manager.cc",
@@ -86,6 +90,8 @@ source_set("test_support") {
   testonly = true
 
   sources = [
+    "blob_channel/mock_blob_channel_receiver.cc",
+    "blob_channel/mock_blob_channel_receiver.h",
     "test_common.cc",
     "test_common.h",
   ]
@@ -113,6 +119,7 @@ source_set("unit_tests") {
     "blob_channel/blob_channel_integration_test.cc",
     "blob_channel/blob_channel_receiver_unittest.cc",
     "blob_channel/blob_channel_sender_unittest.cc",
+    "blob_channel/helium_blob_channel_unittest.cc",
     "browser_connection_handler_unittest.cc",
     "client_connection_manager_unittest.cc",
     "compressed_packet_unittest.cc",