Convert PDF component IPC to mojo.

components/pdf/common/BUILD.gn

Index: components/pdf/common/BUILD.gn
diff --git a/components/pdf/common/BUILD.gn b/components/pdf/common/BUILD.gn
index adff35e0ba6aa6d004194a4d10a576fb81e840bc..83c9d6207199ea86fb3c733c1114f79359dfc001 100644
--- a/components/pdf/common/BUILD.gn
+++ b/components/pdf/common/BUILD.gn
@@ -3,18 +3,18 @@
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
+import("//mojo/public/tools/bindings/mojom.gni")
 
-static_library("common") {
+mojom("interfaces") {
   sources = [
-    "pdf_message_generator.cc",
-    "pdf_message_generator.h",
-    "pdf_messages.h",
+    "pdf.mojom",
   ]
 
-  deps = [
-    "//base",
-    "//content/public/common",
-    "//ipc",
-    "//url",
+  public_deps = [
+    "//third_party/WebKit/public:mojo_bindings",
+    "//url/mojo:url_mojom_gurl",
   ]
+
+  overridden_deps = [ "//third_party/WebKit/public:mojo_bindings" ]
+  component_deps = [ "//content/public/common" ]
 }