Revert "Remove support for MSVC"

sky/engine/public/platform/WebCommon.h

Index: sky/engine/public/platform/WebCommon.h
diff --git a/sky/engine/public/platform/WebCommon.h b/sky/engine/public/platform/WebCommon.h
index 501f1d6cb77489cc165785c1cb3f87d018ddb2c0..9967267124fbc07fcac56c3c567b1ecb35c06b84 100644
--- a/sky/engine/public/platform/WebCommon.h
+++ b/sky/engine/public/platform/WebCommon.h
@@ -44,9 +44,27 @@
 #endif
 
 #if defined(COMPONENT_BUILD)
-    #define BLINK_EXPORT __attribute__((visibility("default")))
-    #define BLINK_PLATFORM_EXPORT __attribute__((visibility("default")))
-    #define BLINK_COMMON_EXPORT __attribute__((visibility("default")))
+    #if defined(WIN32)
+        #if BLINK_IMPLEMENTATION
+            #define BLINK_EXPORT __declspec(dllexport)
+        #else // BLINK_IMPLEMENTATION
+            #define BLINK_EXPORT __declspec(dllimport)
+        #endif
+        #if BLINK_PLATFORM_IMPLEMENTATION
+            #define BLINK_PLATFORM_EXPORT __declspec(dllexport)
+        #else // BLINK_PLATFORM_IMPLEMENTATION
+            #define BLINK_PLATFORM_EXPORT __declspec(dllimport)
+        #endif
+        #if BLINK_COMMON_IMPLEMENTATION
+            #define BLINK_COMMON_EXPORT __declspec(dllexport)
+        #else // BLINK_COMMON_IMPLEMENTATION
+            #define BLINK_COMMON_EXPORT __declspec(dllimport)
+        #endif
+    #else // defined(WIN32)
+        #define BLINK_EXPORT __attribute__((visibility("default")))
+        #define BLINK_PLATFORM_EXPORT __attribute__((visibility("default")))
+        #define BLINK_COMMON_EXPORT __attribute__((visibility("default")))
+    #endif
 #else // defined(COMPONENT_BUILD)
     #define BLINK_EXPORT
     #define BLINK_PLATFORM_EXPORT
@@ -58,7 +76,17 @@
 // Basic types
 
 #include <stddef.h> // For size_t
+
+#if defined(WIN32)
+// Visual Studio doesn't have stdint.h.
+typedef short int16_t;
+typedef unsigned short uint16_t;
+typedef int int32_t;
+typedef unsigned int uint32_t;
+typedef unsigned __int64 uint64_t;
+#else
 #include <stdint.h> // For int32_t
+#endif
 
 namespace blink {
 
@@ -66,7 +94,11 @@ namespace blink {
 typedef int32_t WebUChar32;
 
 // UTF-16 character type
+#if defined(WIN32)
+typedef wchar_t WebUChar;
+#else
 typedef unsigned short WebUChar;
+#endif
 
 // Latin-1 character type
 typedef unsigned char WebLChar;