Vulkan config in dm

tools/flags/SkCommonFlagsConfig.cpp

Index: tools/flags/SkCommonFlagsConfig.cpp
diff --git a/tools/flags/SkCommonFlagsConfig.cpp b/tools/flags/SkCommonFlagsConfig.cpp
index 0847ae5b79ea268947ef0bf3c8633c0db754b37d..a0d1c77dd962bc594c7ef77a793e720051349ca6 100644
--- a/tools/flags/SkCommonFlagsConfig.cpp
+++ b/tools/flags/SkCommonFlagsConfig.cpp
@@ -44,6 +44,9 @@ static const char configHelp[] =
 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
     " hwui"
 #endif
+#ifdef SK_VULKAN
+    " vk"
+#endif
     " or use extended form 'backend(option=value,...)'.\n";
 
 static const char configExtendedHelp[] =
@@ -72,6 +75,9 @@ static const char configExtendedHelp[] =
 #if SK_MESA
     "\t\tmesa\t\t\tUse MESA.\n"
 #endif
+#ifdef SK_VULKAN
+    "\t\tvulkan\t\t\tUse Vulkan.\n"
+#endif
     "\tcolor\ttype: string\tdefault: 8888.\n"
     "\t    Select framebuffer color format.\n"
     "\t    Options:\n"
@@ -117,6 +123,9 @@ static const char configExtendedHelp[] =
 #if SK_MESA
     "\tmesa      \t= gpu(api=mesa)\n"
 #endif
+#ifdef SK_VULKAN
+     "\vk        \t= gpu(api=vulkan)\n"
+#endif
 #endif
     ;
 
@@ -159,6 +168,10 @@ static const struct {
 #if SK_MESA
     , { "mesa", "gpu", "api=mesa" }
 #endif
+#ifdef SK_VULKAN
+    , { "vk", "gpu", "api=vulkan" }
+#endif
+
 #else
     { "", "", "" }
 #endif
@@ -251,6 +264,12 @@ static bool parse_option_gpu_api(const SkString& value,
         return true;
     }
 #endif
+#ifdef SK_VULKAN
+    if (value.equals("vulkan")) {
+        *outContextType = GrContextFactory::kVulkan_ContextType;
+        return true;
+    }
+#endif
     return false;
 }
 static bool parse_option_gpu_color(const SkString& value,