Turn //mojo/public/cpp/bindings and //mojo/public/cpp/system into components

mojo/public/cpp/bindings/BUILD.gn

Index: mojo/public/cpp/bindings/BUILD.gn
diff --git a/mojo/public/cpp/bindings/BUILD.gn b/mojo/public/cpp/bindings/BUILD.gn
index 9b9135003603a960fd35eff596cd0a632e74cd91..4d311d5363fc2592951c6d7a75c8be05932c9bda 100644
--- a/mojo/public/cpp/bindings/BUILD.gn
+++ b/mojo/public/cpp/bindings/BUILD.gn
@@ -2,8 +2,25 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-static_library("bindings") {
+interfaces_bindings_gen_dir = "$root_gen_dir/mojo/public/interfaces/bindings"
+
+component("bindings") {
   sources = [
+    # Normally, targets should depend on the source_sets generated by mojom
+    # targets. However, the generated source_sets use portions of the bindings
+    # library. In order to avoid linker warnings about locally-defined imports
+    # in Windows components build, this target depends on the generated .cc

[yzshen1, 2016/09/22 22:31:15]

nit: please consider changing ".cc" to "C++", because we have both .cc and .h
files here. 

[dcheng, 2016/09/24 01:06:44]

Done.

+    # files directly so that the EXPORT macro defintions match.
+    "$interfaces_bindings_gen_dir/interface_control_messages.mojom-shared-internal.h",
+    "$interfaces_bindings_gen_dir/interface_control_messages.mojom-shared.cc",
+    "$interfaces_bindings_gen_dir/interface_control_messages.mojom-shared.h",
+    "$interfaces_bindings_gen_dir/interface_control_messages.mojom.cc",
+    "$interfaces_bindings_gen_dir/interface_control_messages.mojom.h",
+    "$interfaces_bindings_gen_dir/pipe_control_messages.mojom-shared-internal.h",
+    "$interfaces_bindings_gen_dir/pipe_control_messages.mojom-shared.cc",
+    "$interfaces_bindings_gen_dir/pipe_control_messages.mojom-shared.h",
+    "$interfaces_bindings_gen_dir/pipe_control_messages.mojom.cc",
+    "$interfaces_bindings_gen_dir/pipe_control_messages.mojom.h",
     "array.h",
     "array_data_view.h",
     "array_traits.h",
@@ -19,6 +36,7 @@ static_library("bindings") {
     "associated_interface_request.h",
     "binding.h",
     "binding_set.h",
+    "bindings_export.h",
     "connection_error_callback.h",
     "connector.h",
     "enum_traits.h",
@@ -138,8 +156,11 @@ static_library("bindings") {
 
   deps = [
     "//base",
-    "//mojo/public/interfaces/bindings:bindings_cpp_sources",
+    "//mojo/public/interfaces/bindings:bindings__generator",
+    "//mojo/public/interfaces/bindings:bindings_shared__generator",
   ]
+
+  defines = [ "MOJO_CPP_BINDINGS_IMPLEMENTATION" ]
 }
 
 source_set("struct_traits") {