New build target for VulkanContextProvider.

Remove VulkanContextProvider from viz common build target and create a
new target. This is required so that the files which needs to only use
VulkanContextProvider can depend on this new target rather than
depending on whole viz common.

Bug: 891060
Change-Id: Iddff176837a43f029b6466c4b31fedb508d1fb79
Reviewed-on: https://chromium-review.googlesource.com/c/1313114Reviewed-by: Eric Karl <ericrk@chromium.org>
Commit-Queue: vikas soni <vikassoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605130}

components/viz/common/BUILD.gn

@@ -39,6 +39,28 @@ viz_component("resource_format_utils") {
   ]
 }
 
+if (enable_vulkan) {
+  viz_component("vulkan_context_provider") {
+    output_name = "viz_vulkan_context_provider"
+
+    defines = [ "VIZ_VULKAN_CONTEXT_PROVIDER_IMPLEMENTATION" ]
+
+    sources = [
+      "gpu/vulkan_context_provider.h",
+      "gpu/vulkan_in_process_context_provider.cc",
+      "gpu/vulkan_in_process_context_provider.h",
+      "viz_vulkan_context_provider_export.h",
+    ]
+    configs = [ "//third_party/vulkan:vulkan_config" ]
+    deps = [
+      "//base",
+      "//gpu/vulkan",
+      "//gpu/vulkan:buildflags",
+      "//skia",
+    ]
+  }
+}
+
 viz_component("common") {
   output_name = "viz_common"
 
@@ -184,16 +206,6 @@ viz_component("common") {
     "//ui/latency",
   ]
 
-  if (enable_vulkan) {
-    sources += [
-      "gpu/vulkan_context_provider.h",
-      "gpu/vulkan_in_process_context_provider.cc",
-      "gpu/vulkan_in_process_context_provider.h",
-    ]
-    configs = [ "//third_party/vulkan:vulkan_config" ]
-    deps += [ "//gpu/vulkan" ]
-  }
-
   if (is_win) {
     sources += [
       "display/use_layered_window.cc",
@@ -210,6 +222,9 @@ viz_component("common") {
     "//mojo/public/cpp/bindings",
     "//skia",
   ]
+  if (enable_vulkan) {
+    public_deps += [ ":vulkan_context_provider" ]
+  }
 }
 
 viz_source_set("unit_tests") {

components/viz/common/gpu/vulkan_context_provider.h

@@ -6,7 +6,7 @@
 #define COMPONENTS_VIZ_COMMON_GPU_VULKAN_CONTEXT_PROVIDER_H_
 
 #include "base/memory/ref_counted.h"
-#include "components/viz/common/viz_common_export.h"
+#include "components/viz/common/viz_vulkan_context_provider_export.h"
 
 class GrContext;
 
@@ -18,7 +18,7 @@ class VulkanImplementation;
 namespace viz {
 
 // The VulkanContextProvider groups sharing of vulkan objects synchronously.
-class VIZ_COMMON_EXPORT VulkanContextProvider
+class VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT VulkanContextProvider
     : public base::RefCountedThreadSafe<VulkanContextProvider> {
  public:
   virtual gpu::VulkanImplementation* GetVulkanImplementation() = 0;

components/viz/common/gpu/vulkan_in_process_context_provider.h

@@ -8,7 +8,7 @@
 #include <memory>
 
 #include "components/viz/common/gpu/vulkan_context_provider.h"
-#include "components/viz/common/viz_common_export.h"
+#include "components/viz/common/viz_vulkan_context_provider_export.h"
 #include "gpu/vulkan/buildflags.h"
 #if BUILDFLAG(ENABLE_VULKAN)
 #include "third_party/skia/include/gpu/vk/GrVkBackendContext.h"
@@ -21,7 +21,7 @@ class VulkanDeviceQueue;
 
 namespace viz {
 
-class VIZ_COMMON_EXPORT VulkanInProcessContextProvider
+class VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT VulkanInProcessContextProvider
     : public VulkanContextProvider {
  public:
   static scoped_refptr<VulkanInProcessContextProvider> Create(

components/viz/common/viz_vulkan_context_provider_export.h

+// Copyright 2018 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.
+
+#ifndef COMPONENTS_VIZ_COMMON_VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT_H_
+#define COMPONENTS_VIZ_COMMON_VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT_H_
+
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(VIZ_VULKAN_CONTEXT_PROVIDER_IMPLEMENTATION)
+#define VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT __declspec(dllexport)
+#else
+#define VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT __declspec(dllimport)
+#endif  // defined(VIZ_VULKAN_CONTEXT_PROVIDER_IMPLEMENTATION)
+
+#else  // defined(WIN32)
+#if defined(VIZ_VULKAN_CONTEXT_PROVIDER_IMPLEMENTATION)
+#define VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT \
+  __attribute__((visibility("default")))
+#else
+#define VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT
+#endif
+#endif
+
+#else  // defined(COMPONENT_BUILD)
+#define VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT
+#endif
+
+#endif  // COMPONENTS_VIZ_COMMON_VIZ_VULKAN_CONTEXT_PROVIDER_EXPORT_H_