Wire easy unlock settings UI

- Add API to get/set/clear the pairing info into user prefs;
- Add an onTurnFlowFinished event so that the app can clear its state;
- Extend EasyUnlockService to store pairing info and provide
  turn-off flow support;
- Update settings UI to trigger turn off flow and observe
  the turn-off flow status to show pending/error or dismiss when done;
- Add EasyUnlockToggleFlow to wrap api calls to server;
- Update OAuth2ApiFlow to support application/json content-type and
  handle 204 as success;

BUG=397356,394640

Review URL: https://codereview.chromium.org/475483003

Cr-Commit-Position: refs/heads/master@{#290019}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@290019 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 8 insertions, 2 deletions

diff --git a/google_apis/gaia/oauth2_api_call_flow.cc b/google_apis/gaia/oauth2_api_call_flow.cc
index 08312eb..07f3208 100644
--- a/google_apis/gaia/oauth2_api_call_flow.cc
+++ b/google_apis/gaia/oauth2_api_call_flow.cc
@@ -90,7 +90,8 @@ void OAuth2ApiCallFlow::EndApiCall(const net::URLFetcher* source) {
     return;
   }
 
-  if (source->GetResponseCode() != net::HTTP_OK) {
+  if (source->GetResponseCode() != net::HTTP_OK &&
+      source->GetResponseCode() != net::HTTP_NO_CONTENT) {
     state_ = ERROR_STATE;
     ProcessApiCallFailure(source);
     return;
@@ -125,6 +126,10 @@ void OAuth2ApiCallFlow::EndMintAccessToken(
   }
 }
 
+std::string OAuth2ApiCallFlow::CreateApiCallBodyContentType() {
+  return "application/x-www-form-urlencoded";
+}
+
 OAuth2AccessTokenFetcher* OAuth2ApiCallFlow::CreateAccessTokenFetcher() {
   return new OAuth2AccessTokenFetcherImpl(this, context_, refresh_token_);
 }
@@ -166,7 +171,7 @@ URLFetcher* OAuth2ApiCallFlow::CreateURLFetcher() {
   result->SetAutomaticallyRetryOnNetworkChanges(3);
 
   if (!empty_body)
-    result->SetUploadData("application/x-www-form-urlencoded", body);
+    result->SetUploadData(CreateApiCallBodyContentType(), body);
 
   return result;
 }
diff --git a/google_apis/gaia/oauth2_api_call_flow.h b/google_apis/gaia/oauth2_api_call_flow.h
index b29bc8a..70c9b51 100644
--- a/google_apis/gaia/oauth2_api_call_flow.h
+++ b/google_apis/gaia/oauth2_api_call_flow.h
@@ -66,6 +66,7 @@ class OAuth2ApiCallFlow
   // Methods to help create HTTP request.
   virtual GURL CreateApiCallUrl() = 0;
   virtual std::string CreateApiCallBody() = 0;
+  virtual std::string CreateApiCallBodyContentType();
 
   // Sub-classes can expose an appropriate observer interface by implementing
   // these template methods.