Allow --enable-vulkan with viz_unittests

This will use GPU because we do not have vulkan software rasterization.
Main changes:

1) Have SkiaOutputSurfaceImplOnGpu create an offscreen render surface
   when there is no AcceleratedWidget to render to.

2) Have unittests create a VulkanInstance when making their own
   GpuServiceImpl.

Bug: 930740
Change-Id: Ie5b837bac1bcc5576913c8b1019d34196949d6de
Reviewed-on: https://chromium-review.googlesource.com/c/1464652
Commit-Queue: Jonathan Backer <backer@chromium.org>
Reviewed-by: kylechar <kylechar@chromium.org>
Reviewed-by: Peng Huang <penghuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#631936}

cc/BUILD.gn

@@ -1,6 +1,7 @@
-# Copyright 2014 T/e Chromium Authors. All rights reserved.
+# 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.
+import("//gpu/vulkan/features.gni")
 
 import("//cc/cc.gni")
 
@@ -548,6 +549,9 @@ cc_test_static_library("test_support") {
     "//ui/gl:test_support",
     "//ui/latency",
   ]
+  if (enable_vulkan) {
+    deps += [ "//gpu/vulkan/init" ]
+  }
   if (!is_android) {
     data_deps = [
       "//third_party/mesa_headers",

cc/test/DEPS

@@ -23,4 +23,7 @@ specific_include_rules = {
   "cc_test_suite\.cc": [
     "+gpu/config",
   ],
+  "pixel_test\.cc": [
+    "+gpu/command_buffer/service/service_utils.h",
+  ],
 }

cc/test/pixel_test.cc

@@ -39,6 +39,7 @@
 #include "components/viz/test/test_shared_bitmap_manager.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu/command_buffer/client/shared_memory_limits.h"
+#include "gpu/command_buffer/service/service_utils.h"
 #include "gpu/config/gpu_feature_type.h"
 #include "gpu/config/gpu_info.h"
 #include "gpu/ipc/gpu_in_process_thread_service.h"
@@ -49,6 +50,11 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/init/gl_factory.h"
 
+#if BUILDFLAG(ENABLE_VULKAN)
+#include "gpu/vulkan/init/vulkan_factory.h"
+#include "gpu/vulkan/vulkan_implementation.h"
+#endif
+
 namespace cc {
 
 PixelTest::PixelTest()
@@ -241,16 +247,35 @@ void PixelTest::SetUpGLRenderer(bool flipped_output_surface) {
 
 void PixelTest::SetUpGpuServiceOnGpuThread(base::WaitableEvent* event) {
   ASSERT_TRUE(gpu_thread_->task_runner()->BelongsToCurrentThread());
+  const base::CommandLine* command_line =
+      base::CommandLine::ForCurrentProcess();
+  gpu::GpuPreferences gpu_preferences =
+      gpu::gles2::ParseGpuPreferences(command_line);
+  if (gpu_preferences.enable_vulkan) {
+#if BUILDFLAG(ENABLE_VULKAN)
+    vulkan_implementation_ = gpu::CreateVulkanImplementation();
+    if (!vulkan_implementation_ ||
+        !vulkan_implementation_->InitializeVulkanInstance()) {
+      LOG(FATAL) << "Failed to create and initialize Vulkan implementation.";
+    }
+#else
+    NOTREACHED();
+#endif
+  }
   gpu::GpuFeatureInfo gpu_feature_info;
   // To test SkiaRenderer with DDL, we need enable OOP-R.
   gpu_feature_info.status_values[gpu::GPU_FEATURE_TYPE_OOP_RASTERIZATION] =
       gpu::kGpuFeatureStatusEnabled;
   gpu_service_ = std::make_unique<viz::GpuServiceImpl>(
       gpu::GPUInfo(), nullptr /* watchdog_thread */, io_thread_->task_runner(),
-      gpu_feature_info, gpu::GpuPreferences(),
+      gpu_feature_info, gpu_preferences,
       gpu::GPUInfo() /* gpu_info_for_hardware_gpu */,
       gpu::GpuFeatureInfo() /* gpu_feature_info_for_hardware_gpu */,
+#if BUILDFLAG(ENABLE_VULKAN)
+      vulkan_implementation_.get(),
+#else
       nullptr /* vulkan_implementation */,
+#endif
       base::DoNothing() /* exit_callback */);
 
   // Uses a null gpu_host here, because we don't want to receive any message.

cc/test/pixel_test.h

@@ -18,6 +18,7 @@
 #include "components/viz/service/display/software_renderer.h"
 #include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
 #include "gpu/ipc/in_process_command_buffer.h"
+#include "gpu/vulkan/buildflags.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gl/gl_implementation.h"
@@ -29,6 +30,12 @@ class ScopedFeatureList;
 }
 }
 
+#if BUILDFLAG(ENABLE_VULKAN)
+namespace gpu {
+class VulkanImplementation;
+}
+#endif
+
 namespace viz {
 class CopyOutputResult;
 class DirectRenderer;
@@ -121,6 +128,10 @@ class PixelTest : public testing::Test {
 
   std::unique_ptr<gl::DisableNullDrawGLBindings> enable_pixel_output_;
   std::unique_ptr<base::test::ScopedFeatureList> scoped_feature_list_;
+
+#if BUILDFLAG(ENABLE_VULKAN)
+  std::unique_ptr<gpu::VulkanImplementation> vulkan_implementation_;
+#endif
 };
 
 template<typename RendererType>

components/viz/service/BUILD.gn

@@ -445,6 +445,10 @@ viz_source_set("unit_tests") {
   if (is_android) {
     sources += [ "frame_sinks/external_begin_frame_source_android_unittest.cc" ]
   }
+
+  if (enable_vulkan) {
+    deps += [ "//gpu/vulkan/init" ]
+  }
 }
 
 viz_source_set("perf_tests") {