[Autofill] Add protobuf for Google Wallet risk parameters and a utility function for filling it out.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 59aebdaf4be105b969de31f6012b7325622885c7..39c1a2149f8cc9749c07e25701e9455590f20ec8 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -208,6 +208,8 @@
         'browser/autofill/autofill_regex_constants.h',
         'browser/autofill/autofill_regexes.cc',
         'browser/autofill/autofill_regexes.h',
+        'browser/autofill/risk/machine_fingerprint.cc',
+        'browser/autofill/risk/machine_fingerprint.h',
         'browser/autofill/autofill_scanner.cc',
         'browser/autofill/autofill_scanner.h',
         'browser/autofill/autofill_type.cc',
@@ -2211,6 +2213,7 @@
         ['OS != "ios"', {
           'dependencies': [
             'autofill_regexes',
+            'autofill_risk_proto',
             'browser/performance_monitor/performance_monitor.gyp:performance_monitor',
             'browser_extensions',
             'common/extensions/api/api.gyp:api',
@@ -2968,6 +2971,19 @@
       }],
     },
     {
+      # Protobuf compiler / generate rule for Autofill's risk integration.
+      'target_name': 'autofill_risk_proto',
+      'type': 'static_library',
+      'sources': [
+        'browser/autofill/risk/proto/machine_fingerprint.proto',
+      ],
+      'variables': {
+        'proto_in_dir': 'browser/autofill/risk/proto',
+        'proto_out_dir': 'chrome/browser/autofill/risk/proto',
+      },
+      'includes': [ '../build/protoc.gypi' ]
+    },
+    {
       # Protobuf compiler / generator for the fraudulent certificate reporting
       # protocol buffer.
       'target_name': 'cert_logger_proto',