Introduce Android WSI extension for Vulkan.

gpu/vulkan/vulkan_implementation.cc

 // Copyright (c) 2016 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 "gpu/vulkan/vulkan_implementation.h"
 
 #include <unordered_set>
 #include <vector>
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 42 matching lines @@
     VkApplicationInfo app_info = {};
     app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
     app_info.pApplicationName = "Chromium";
     app_info.apiVersion = VK_MAKE_VERSION(1, 0, 2);
 
     std::vector<const char*> enabled_ext_names;
     enabled_ext_names.push_back(VK_KHR_SURFACE_EXTENSION_NAME);
 
 #if defined(VK_USE_PLATFORM_XLIB_KHR)
     enabled_ext_names.push_back(VK_KHR_XLIB_SURFACE_EXTENSION_NAME);
+#elif defined(VK_USE_PLATFORM_ANDROID_KHR)
+    enabled_ext_names.push_back(VK_KHR_ANDROID_SURFACE_EXTENSION_NAME);
 #endif
 
     uint32_t num_instance_exts = 0;
     result = vkEnumerateInstanceExtensionProperties(nullptr, &num_instance_exts,
                                                     nullptr);
     if (VK_SUCCESS != result) {
       DLOG(ERROR) << "vkEnumerateInstanceExtensionProperties(NULL) failed: "
                   << result;
       return false;
     }
@@ skipping 118 matching lines @@
   return vulkan_instance->valid;
 }
 
 VkInstance GetVulkanInstance() {
   DCHECK(vulkan_instance);
   DCHECK(vulkan_instance->valid);
   return vulkan_instance->vk_instance;
 }
 
 }  // namespace gpu