ui: No more TestCompositor. Use NullDraw contexts in unit tests.

content/browser/compositor/image_transport_factory.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/compositor/image_transport_factory.h"
 
+#include "base/command_line.h"
 #include "content/browser/compositor/gpu_process_transport_factory.h"
 #include "content/browser/compositor/no_transport_image_transport_factory.h"
 #include "ui/compositor/compositor.h"
+#include "ui/compositor/compositor_switches.h"
+#include "ui/gl/gl_implementation.h"
 
 namespace content {
 
 namespace {
 ImageTransportFactory* g_factory = NULL;
 bool g_initialized_for_unit_tests = false;
+static gfx::DisableNullDrawGLBindings* g_disable_null_draw = NULL;
 }
 
 // static
 void ImageTransportFactory::Initialize() {
   DCHECK(!g_factory || g_initialized_for_unit_tests);
   if (g_initialized_for_unit_tests)
     return;
   g_factory = new GpuProcessTransportFactory;
   ui::ContextFactory::SetInstance(g_factory->AsContextFactory());
 }
 
 void ImageTransportFactory::InitializeForUnitTests(
     scoped_ptr<ui::ContextFactory> test_factory) {
   DCHECK(!g_factory);
   DCHECK(!g_initialized_for_unit_tests);
   g_initialized_for_unit_tests = true;
+
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kEnablePixelOutputInTests))
+    g_disable_null_draw = new gfx::DisableNullDrawGLBindings;

[danakj, 2014/01/29 01:28:21]

This is duplicated with the InitializeContextFactoryForTest. I would like to fix
that by moving it up into the InProcessContextFactory, I think. In a followup.

+
   g_factory = new NoTransportImageTransportFactory(test_factory.Pass());
   ui::ContextFactory::SetInstance(g_factory->AsContextFactory());
 }
 
 // static
 void ImageTransportFactory::Terminate() {
   ui::ContextFactory::SetInstance(NULL);
   delete g_factory;
   g_factory = NULL;
+  delete g_disable_null_draw;
+  g_disable_null_draw = NULL;
   g_initialized_for_unit_tests = false;
 }
 
 // static
 ImageTransportFactory* ImageTransportFactory::GetInstance() {
   return g_factory;
 }
 
 }  // namespace content