Reduce/remove usage of BrowserThread in content/browser/loader.

content/public/test/test_renderer_host.cc

Index: content/public/test/test_renderer_host.cc
diff --git a/content/public/test/test_renderer_host.cc b/content/public/test/test_renderer_host.cc
index 538a2ccbff5ccb373e97f3fe458e113df2f68736..8ac2eeb1dd2325bae7e07ce3fed67487dcd2f9d7 100644
--- a/content/public/test/test_renderer_host.cc
+++ b/content/public/test/test_renderer_host.cc
@@ -12,6 +12,7 @@
 #include "build/build_config.h"
 #include "content/browser/compositor/test/no_transport_image_transport_factory.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
+#include "content/browser/loader/loader_globals.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/site_instance_impl.h"
@@ -141,6 +142,19 @@ RenderViewHostTestEnabler::RenderViewHostTestEnabler()
   if (base::ThreadTaskRunnerHandle::IsSet())
     ui::WindowResizeHelperMac::Get()->Init(base::ThreadTaskRunnerHandle::Get());
 #endif  // OS_MACOSX
+  // TODO(ananta)
+  // Tests which use the RenderViewHostTestEnabler can run
+  // content/browser/loader code which assumes UI thread, IO thread task runner
+  // availability. As a workaround we instantiate the
+  // content/browser/loader/LoaderGlobals class which provides access to these
+  // task runners to the relevant code. This hack will go away when the loader
+  // code becomes part of the network service. We don't want to create the
+  // LoaderGlobals class if it already exists.
+  if (!LoaderGlobals::Get()) {
+    loader_globals_.reset(new content::LoaderGlobals(
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::UI),
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::IO)));
+  }
 }
 
 RenderViewHostTestEnabler::~RenderViewHostTestEnabler() {
@@ -158,7 +172,6 @@ RenderViewHostTestEnabler::~RenderViewHostTestEnabler() {
 
 
 // RenderViewHostTestHarness --------------------------------------------------
-
 RenderViewHostTestHarness::RenderViewHostTestHarness()
     : thread_bundle_options_(TestBrowserThreadBundle::DEFAULT) {}
 
@@ -284,6 +297,20 @@ void RenderViewHostTestHarness::SetUp() {
 
   if (IsBrowserSideNavigationEnabled())
     BrowserSideNavigationSetUp();
+
+  // TODO(ananta)
+  // Tests which use the RenderViewHostTestHarness can run
+  // content/browser/loader code which assumes UI thread, IO thread task runner
+  // availability. As a workaround we instantiate the
+  // content/browser/loader/LoaderGlobals class which provides access to these
+  // task runners to the relevant code. This hack will go away when the loader
+  // code becomes part of the network service. We don't want to create the
+  // LoaderGlobals class if it already exists.
+  if (!LoaderGlobals::Get()) {
+    loader_globals_.reset(new content::LoaderGlobals(
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::UI),
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::IO)));
+  }
 }
 
 void RenderViewHostTestHarness::TearDown() {