Remove more unnecessary ChromeURLRequestContext members.

chrome/test/testing_browser_process.cc

Index: chrome/test/testing_browser_process.cc
diff --git a/chrome/test/testing_browser_process.cc b/chrome/test/testing_browser_process.cc
index b3cde66ff0cedbb9d0c128ff2999bb2bf9528bdd..43188d53367755a5cd407824d4c6f65e5b5c860a 100644
--- a/chrome/test/testing_browser_process.cc
+++ b/chrome/test/testing_browser_process.cc
@@ -19,7 +19,8 @@
 TestingBrowserProcess::TestingBrowserProcess()
     : module_ref_count_(0),
       app_locale_("en"),
-      local_state_(NULL) {
+      local_state_(NULL),
+      io_thread_(NULL) {
 }
 
 TestingBrowserProcess::~TestingBrowserProcess() {
@@ -38,7 +39,7 @@ MetricsService* TestingBrowserProcess::metrics_service() {
 }
 
 IOThread* TestingBrowserProcess::io_thread() {
-  return NULL;
+  return io_thread_;
 }
 
 base::Thread* TestingBrowserProcess::file_thread() {
@@ -248,6 +249,10 @@ void TestingBrowserProcess::SetGoogleURLTracker(
   google_url_tracker_.reset(google_url_tracker);
 }
 
+void TestingBrowserProcess::SetIOThread(IOThread* io_thread) {
+  io_thread_ = io_thread;
+}
+
 ScopedTestingBrowserProcess::ScopedTestingBrowserProcess() {
   // TODO(phajdan.jr): Temporary, for http://crbug.com/61062.
   // ChromeTestSuite sets up a global TestingBrowserProcess