content: Add ContextProviderFactory to create a render ContextProvider.

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 a7ff602e3653a3139832b0ea55c51be3b4e9f53e..d385871bbf9ea30a84975834abc2050cec70f82a 100644
--- a/content/public/test/test_renderer_host.cc
+++ b/content/public/test/test_renderer_host.cc
@@ -28,6 +28,10 @@
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/test/material_design_controller_test_api.h"
 
+#if defined(OS_ANDROID)
+#include "content/browser/renderer_host/context_provider_factory_impl_android.h"
+#endif
+
 #if defined(OS_WIN)
 #include "ui/base/win/scoped_ole_initializer.h"
 #endif
@@ -198,6 +202,9 @@ void RenderViewHostTestHarness::SetUp() {
 #if !defined(OS_ANDROID)
   ImageTransportFactory::InitializeForUnitTests(
       base::WrapUnique(new NoTransportImageTransportFactory));
+#else
+  ui::ContextProviderFactory::SetInstance(
+      ContextProviderFactoryImpl::GetInstance());
 #endif
 #if defined(USE_AURA)
   ui::ContextFactory* context_factory =
@@ -263,6 +270,8 @@ void RenderViewHostTestHarness::TearDown() {
     // RenderWidgetHostView holds on to a reference to SurfaceManager, so it
     // must be shut down before the ImageTransportFactory.
     ImageTransportFactory::Terminate();
+#else
+  ui::ContextProviderFactory::SetInstance(nullptr);
 #endif
 }