Making OAuth2TokenService multi-login aware, updating callers, minor fixes

chrome/browser/ui/webui/print_preview/print_preview_handler.cc

Index: chrome/browser/ui/webui/print_preview/print_preview_handler.cc
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
index d6dae2b8e70f402a7864c19d05096e0a818c544a..608744c00571689eed09c35fc570ff69b17d7b8f 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
+++ b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
@@ -259,10 +259,15 @@ class PrintPreviewHandler::AccessTokenService
       return;  // Already in progress.
 
     OAuth2TokenService* service = NULL;
+    std::string account_id;
     if (type == "profile") {
       Profile* profile = Profile::FromWebUI(handler_->web_ui());
-      if (profile)
-        service = ProfileOAuth2TokenServiceFactory::GetForProfile(profile);
+      if (profile) {
+        ProfileOAuth2TokenService* token_service =
+            ProfileOAuth2TokenServiceFactory::GetForProfile(profile);
+        account_id = token_service->GetPrimaryAccountId();
+        service = token_service;
+      }
     } else if (type == "device") {
 #if defined(OS_CHROMEOS)
       service = chromeos::DeviceOAuth2TokenServiceFactory::Get();
@@ -273,7 +278,7 @@ class PrintPreviewHandler::AccessTokenService
       OAuth2TokenService::ScopeSet oauth_scopes;
       oauth_scopes.insert(cloud_print::kCloudPrintAuth);
       scoped_ptr<OAuth2TokenService::Request> request(
-          service->StartRequest(oauth_scopes, this));
+          service->StartRequest(account_id, oauth_scopes, this));

[Roger Tawa OOO till Jul 10th, 2013/08/26 21:04:53]

I the case of chromeos and type=="device", account_id will be an empry string. 
Is that allowed?

[fgorski, 2013/08/26 23:30:54]

It's exactly what I expect to happen. I'll document that.
Alternate solution is to use GetRobotAccountId(), if it makes sense, and
provided we make it accessible.

       requests_[type].reset(request.release());
     } else {
       handler_->SendAccessToken(type, std::string());  // Unknown type.