Eliminate BrowserProcess dependency from sign-in production code.

chrome/browser/signin/DEPS

Index: chrome/browser/signin/DEPS
diff --git a/chrome/browser/signin/DEPS b/chrome/browser/signin/DEPS
index 9f4d6abab99b1cd5dd64c3f453e9e2b03218f05e..4c69ecb7d95d2f5b874b1d7bfb0adc44cf662d58 100644
--- a/chrome/browser/signin/DEPS
+++ b/chrome/browser/signin/DEPS
@@ -8,7 +8,6 @@ include_rules = [
   "+chrome/browser/signin",
 
   # TODO(joi): Get this list to zero.
-  "!chrome/browser/browser_process.h",
   "!chrome/browser/policy/cloud/user_policy_signin_service.h",
   "!chrome/browser/policy/cloud/user_policy_signin_service_factory.h",
   "!chrome/browser/profiles/profile.h",
@@ -47,6 +46,7 @@ include_rules = [
 specific_include_rules = {
   r".*_[a-z]*test\.cc": [
     # TODO(joi): Get this list to zero.
+    "!chrome/browser/browser_process.h",
     "!chrome/browser/prefs/browser_prefs.h",
     "!chrome/browser/sync/profile_sync_service_mock.h",
     "!chrome/browser/ui/browser.h",
@@ -56,7 +56,10 @@ specific_include_rules = {
   ],
 
   # These files are staying in //chrome so no need to limit.
-  r"chrome_signin_manager_delegate\.(h|cc)": [
+  r"(chrome_signin_manager_delegate|"
+  r"signin_names_io_thread.*|"
+  r"signin_manager_factory)"
+  r"\.(h|cc)": [
     "+chrome/browser",
     "+chrome/common",
   ],