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

mojo/public/tools/bindings/mojom.gni

Index: mojo/public/tools/bindings/mojom.gni
diff --git a/mojo/public/tools/bindings/mojom.gni b/mojo/public/tools/bindings/mojom.gni
index be36cb49d6200e1ea6742b1bceeb4a5bcbd6aba6..757e06efb07ddc62b41aa28ec3ce358050db1ce9 100644
--- a/mojo/public/tools/bindings/mojom.gni
+++ b/mojo/public/tools/bindings/mojom.gni
@@ -204,6 +204,10 @@ template("mojom") {
       full_name = get_label_info("$d", "label_no_toolchain")
       public_deps += [ "${full_name}_${shared_cpp_sources_suffix}" ]
     }
+    defines = []
+    if (defined(invoker.export_define)) {
+      defines += [ invoker.export_define ]

[dcheng, 2016/09/21 23:21:03]

I'm not actually sure this is the best fix. The problem is that
//mojo/public/cpp/bindings depends on
//mojo/public/interfaces/bindings:bindings_cpp_sources. This depends on the
shared sources, which use some code from //mojo/public/cpp/bindings. Since it's
all built into the same component, we need to make sure the EXPORT macros agree
on whether or not this is importing or exporting, otherwise you get a bunch of
linker warnings on Windows. I'm open to other ideas.

+    }
   }
 
   # Generate code for variants.