bluetooth: Introduce Web Bluetooth mojom interface

This is the first step to moving Web Bluetooth over to mojo. This patch
does the following:

- Creates a new WebBluetoothError mojo enum in a new web_bluetooth.mojom.
  This enum should be accessible from both content and blink.
- Modifies WebKit/public/BUILD.gn and WebKit/public/blink.gyp to
  generate the headers for the new mojom interface.
- Modifies WebKit/public/BUILD.gn, WebKit/Source/BUILD.gn,
  WebKit/public/blink_headers.gyp, and WebKit/Source/config.gyp to
  include files in gen/third_party/WebKit
- Modifies content/browser/DEPS so that the new headers can be accessed
  from content/browser.

Follow up patch with Web Bluetooth Service: http://crrev.com/1775953004

BUG=508771

Review URL: https://codereview.chromium.org/1784613002

Cr-Commit-Position: refs/heads/master@{#381525}

content/browser/DEPS

@@ -99,6 +99,10 @@ include_rules = [
   "+third_party/WebKit/public/web/WebTreeScopeType.h",
   "+third_party/WebKit/public/web/mac/WebScrollbarTheme.h",
 
+  # Until we define where mojo interfaces should live in blink we whitelist each
+  # one separately.
+  "+third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom.h"
+
   # DO NOT ADD ANY CHROME OR COMPONENTS INCLUDES HERE!!!
   # See https://sites.google.com/a/chromium.org/dev/developers/content-module
   # for more information.

content/common/BUILD.gn

@@ -551,6 +551,7 @@ mojom("mojo_bindings") {
     "//content/public/common:mojo_bindings",
     "//mojo/shell/public/interfaces",
     "//skia/public/interfaces",
+    "//third_party/WebKit/public:mojo_bindings",
     "//ui/mojo/geometry:interfaces",
   ]
 }

content/content_common_mojo_bindings.gyp

@@ -42,13 +42,14 @@
         '../mojo/mojo_base.gyp:mojo_application_bindings',
         '../mojo/mojo_public.gyp:mojo_cpp_bindings',
         '../skia/skia.gyp:skia_mojo',
+        '../third_party/WebKit/public/blink.gyp:mojo_bindings',
         '../ui/mojo/geometry/mojo_bindings.gyp:mojo_geometry_bindings',
         '../url/url.gyp:url_interfaces_mojom',
       ],
       'export_dependent_settings': [
         '../url/url.gyp:url_interfaces_mojom',
       ],
-      'includes': [ '../mojo/mojom_bindings_generator_explicit.gypi' ], 
+      'includes': [ '../mojo/mojom_bindings_generator_explicit.gypi' ],
     },
     {
       'target_name': 'content_common_mojo_bindings',

third_party/WebKit/Source/BUILD.gn

@@ -31,6 +31,7 @@ config("config") {
     ".",
     "..",
     "$root_gen_dir/blink",
+    "$root_gen_dir/third_party/WebKit",
   ]
 
   cflags = []

third_party/WebKit/Source/config.gyp

@@ -56,6 +56,7 @@
       'include_dirs': [
         '.',
         '..',
+        '<(SHARED_INTERMEDIATE_DIR)/third_party/WebKit',
       ],
       'msvs_disabled_warnings': [
         4305, 4324, 4714, 4800, 4996,

third_party/WebKit/public/BUILD.gn

@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//mojo/public/tools/bindings/mojom.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//tools/grit/grit_rule.gni")
 
@@ -83,7 +84,10 @@ group("all_blink") {
 }
 
 config("blink_headers_config") {
-  include_dirs = [ ".." ]
+  include_dirs = [
+    "..",
+    "$root_gen_dir/third_party/WebKit",
+  ]
 
   # Allow :blink_headers to include v8.h without linking to it.
   configs = [ "//v8:external_config" ]
@@ -169,3 +173,9 @@ grit("image_resources") {
     "blink_image_resources_200_percent.pak",
   ]
 }
+
+mojom("mojo_bindings") {
+  sources = [
+    "platform/modules/bluetooth/web_bluetooth.mojom",
+  ]
+}

third_party/WebKit/public/blink.gyp

@@ -37,6 +37,7 @@
             'target_name': 'blink',
             'type': 'none',
             'dependencies': [
+                'mojo_bindings',
                 '../Source/platform/blink_platform.gyp:blink_platform',
                 '../Source/web/web.gyp:blink_web',
                 '<(DEPTH)/mojo/mojo_edk.gyp:mojo_system_impl',
@@ -80,5 +81,25 @@
                 '../Source/web/web.gyp:blink_web_test_support',
             ],
         },
+        {
+            'target_name': 'mojo_bindings_mojom',
+            'type': 'none',
+            'variables': {
+              'mojom_files': [
+                'platform/modules/bluetooth/web_bluetooth.mojom',
+              ],
+            },
+            'includes': [
+              '../../../mojo/mojom_bindings_generator_explicit.gypi',
+            ],
+        },
+        {
+            'target_name': 'mojo_bindings',
+            'type': 'static_library',
+            'dependencies': [
+              'mojo_bindings_mojom',
+              '../../../mojo/mojo_public.gyp:mojo_cpp_bindings',
+            ],
+        },
     ],
 }

third_party/WebKit/public/blink_headers.gyp

@@ -10,7 +10,10 @@
             'target_name': 'blink_headers',
             'type': 'none',
             'direct_dependent_settings': {
-              'include_dirs': [ '..' ],
+              'include_dirs': [
+                '..',
+                '<(SHARED_INTERMEDIATE_DIR)/third_party/WebKit',
+              ],
             },
             'includes': [ 'blink_headers.gypi' ],
             'sources': ['<@(blink_public_sources)'],

third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom

+// Copyright 2016 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 blink.mojom;
+
+enum WebBluetoothError {
+  SUCCESS
+};
+
+// TODO(ortuno): Define Bluetooth Service.
+// https://crbug.com/508771