Clean up Mojo C API dependent targets

mojo/common/BUILD.gn

Index: mojo/common/BUILD.gn
diff --git a/mojo/common/BUILD.gn b/mojo/common/BUILD.gn
index 7ef74fd5e6b71e4c3a2c7e62fbb0173b205f9241..9a8b7d07c13372633bd7f92dea27b206a7298da0 100644
--- a/mojo/common/BUILD.gn
+++ b/mojo/common/BUILD.gn
@@ -39,14 +39,13 @@ component("common_base") {
   defines = [ "MOJO_COMMON_IMPLEMENTATION" ]
 
   public_deps = [
+    "//base",
+    "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
   ]
 
   deps = [
-    "//base",
     "//base/third_party/dynamic_annotations",
-    "//mojo/public/c/system:for_component",
-    "//mojo/public/cpp/bindings",
   ]
 }
 
@@ -57,11 +56,13 @@ source_set("url_type_converters") {
     "url_type_converters.h",
   ]
 
+  public_deps = [
+    "//mojo/public/cpp/bindings",
+  ]
+
   deps = [
-    ":common_base",
     "//base",
     "//base/third_party/dynamic_annotations",
-    "//mojo/public/cpp/bindings",
     "//url",
   ]
 }