Blimp: Add BlobChannelReceiver and bindings interface.

blimp/net/BUILD.gn

Index: blimp/net/BUILD.gn
diff --git a/blimp/net/BUILD.gn b/blimp/net/BUILD.gn
index 0b722be06e7d92c29ee3f5e29f086b7abc1909bd..f55a31f3342fc653a780575c3b403481164fc057 100644
--- a/blimp/net/BUILD.gn
+++ b/blimp/net/BUILD.gn
@@ -23,6 +23,8 @@ component("net") {
     "blimp_message_thread_pipe.h",
     "blimp_net_export.h",
     "blimp_transport.h",
+    "blob_channel/blob_channel_receiver.cc",
+    "blob_channel/blob_channel_receiver.h",
     "browser_connection_handler.cc",
     "browser_connection_handler.h",
     "client_connection_manager.cc",
@@ -103,6 +105,7 @@ source_set("unit_tests") {
     "blimp_message_output_buffer_unittest.cc",
     "blimp_message_pump_unittest.cc",
     "blimp_message_thread_pipe_unittest.cc",
+    "blob_channel/blob_channel_receiver_unittest.cc",
     "browser_connection_handler_unittest.cc",
     "client_connection_manager_unittest.cc",
     "compressed_packet_unittest.cc",
@@ -123,6 +126,7 @@ source_set("unit_tests") {
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//blimp/common",
+    "//blimp/common:test_support",
     "//blimp/common/proto",
     "//net:test_support",
     "//testing/gmock",