Blimp OAuth2 token retreival on application start up.

blimp/client/core/BUILD.gn

Index: blimp/client/core/BUILD.gn
diff --git a/blimp/client/core/BUILD.gn b/blimp/client/core/BUILD.gn
index 6cfad7d81ed9062228f76ec7b994df16e2a71d32..e0ffd9b8f3cbeb53bc33db8ed2e8ad9829c5e96c 100644
--- a/blimp/client/core/BUILD.gn
+++ b/blimp/client/core/BUILD.gn
@@ -54,6 +54,7 @@ source_set("dummy_core") {
   deps = [
     "//base",
     "//blimp/client/public:public_headers",
+    "//google_apis",
     "//url",
   ]
 
@@ -72,21 +73,37 @@ source_set("unit_tests") {
   testonly = true
 
   sources = [
+    "authenticator_unittest.cc",
     "blimp_client_context_impl_unittest.cc",
   ]
 
   deps = [
+    ":auth",
     ":context",
     "//blimp/client/core/compositor:unit_tests",
     "//blimp/client/core/contents:unit_tests",
     "//blimp/client/core/session:unit_tests",
     "//blimp/client/public:public_headers",
     "//blimp/client/test",
+    "//google_apis:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }
 
+source_set("auth") {

[nyquist, 2016/08/10 01:20:33]

Could we move this into //blimp/client/core/session ?

[xingliu, 2016/08/10 21:03:14]

Done.

+  sources = [
+    "authenticator.cc",
+    "authenticator.h",
+  ]
+
+  public_deps = [
+    "//base",
+    "//blimp/client/public:public_headers",
+    "//google_apis",
+  ]
+}
+
 source_set("context") {
   sources = [
     "blimp_client_context_impl.cc",
@@ -94,6 +111,7 @@ source_set("context") {
   ]
 
   public_deps = [
+    ":auth",
     "//base",
     "//blimp/client/core/contents",
     "//blimp/client/core/session",
@@ -166,12 +184,23 @@ if (is_android) {
     ]
   }
 
+  android_library("common_java") {
+    visibility = [ "//blimp/client/*" ]
+
+    java_files = [ "android/java/src/org/chromium/blimp/core/common/PreferencesUtil.java" ]
+
+    deps = [
+      "//base:base_java",
+    ]
+  }
+
   android_library("context_java") {
     visibility = [ "//blimp/client/*" ]
 
     java_files = [ "android/java/src/org/chromium/blimp/core/BlimpClientContextImpl.java" ]
 
     deps = [
+      ":common_java",
       "//base:base_java",
       "//blimp/client/core:settings_java",
       "//blimp/client/core/contents:contents_java",
@@ -194,6 +223,7 @@ if (is_android) {
     # TODO(xingliu): Remove android support v7 dependency and move android resources to Chrome
     # after Blimp merge to Chrome.
     deps = [
+      ":common_java",
       "//base:base_java",
       "//blimp/client:blimp_java_resources",
       "//blimp/client/public:public_headers_java",