Implement THROTTLED priority semantics.

content/browser/android/url_request_content_job_unittest.cc

Index: content/browser/android/url_request_content_job_unittest.cc
diff --git a/content/browser/android/url_request_content_job_unittest.cc b/content/browser/android/url_request_content_job_unittest.cc
index c87f7e151267c03ef832e7c03bbdfab8d83e3520..f3c764bedfce7cd4c5ab5f1b433eb1c1c2172564 100644
--- a/content/browser/android/url_request_content_job_unittest.cc
+++ b/content/browser/android/url_request_content_job_unittest.cc
@@ -47,7 +47,7 @@ class CallbacksJobFactory : public net::URLRequestJobFactory {
             request,
             network_delegate,
             path_,
-            const_cast<base::MessageLoop*>(&message_loop_)->task_runner());
+            base::MessageLoop::current()->task_runner());

[Ryan Sleevi, 2016/11/07 16:21:38]

Shouldn't this be
https://cs.chromium.org/chromium/src/base/threading/thread_task_runner_handle...

[Randy Smith (Not in Mondays), 2016/11/07 16:58:09]

Given the amount of pain switching over to TTRH cost me when I did it in the
core of this CL (see long list of things Matt has to review), I am totally not
going to do it in someone else's test without an OWNER's request.  At least not
unless you jump up and down and yell about it.  

[Ryan Sleevi, 2016/11/07 17:09:43]

Well, this is directly being touched by you because of line 81 - so I do believe
you're on the hook for this change - either in this CL or immediately following
it :)

     observer_->OnJobCreated();
     return job;
   }
@@ -78,7 +78,6 @@ class CallbacksJobFactory : public net::URLRequestJobFactory {
   }
 
  private:
-  base::MessageLoop message_loop_;
   base::FilePath path_;
   JobObserver* observer_;
 };
@@ -121,6 +120,7 @@ class URLRequestContentJobTest : public testing::Test {
   // retrieved.
   void RunRequest(const Range* range);
 
+  base::MessageLoop message_loop_;
   JobObserverImpl observer_;
   net::TestURLRequestContext context_;
   net::TestDelegate delegate_;