Convert Web Store Inline Install IPCs to mojo

chrome/common/extensions/mojo/inline_install.mojom

Index: chrome/common/extensions/mojo/inline_install.mojom
diff --git a/chrome/common/extensions/mojo/inline_install.mojom b/chrome/common/extensions/mojo/inline_install.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..96dca500d15947a630101cc61962e308af6d9cf2
--- /dev/null
+++ b/chrome/common/extensions/mojo/inline_install.mojom
@@ -0,0 +1,11 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+module extensions.mojom;
+
+interface InlineInstall {
+  // Sent by the renderer to implement chrome.webstore.install().
+  InlineWebstoreInstall(int32 install_id, int32 route_id,
+      string webstore_item_id, int32 listeners_mask);
+};