Clean up input handling in VulkanViewer

tools/vulkan/VulkanTestContext.h

Index: tools/vulkan/VulkanTestContext.h
diff --git a/tools/vulkan/VulkanTestContext.h b/tools/vulkan/VulkanTestContext.h
index c1535b99523f82c8d815053f7830adecb94a4501..b300a578a2a7d43a26c12c82a0788f554d3100af 100644
--- a/tools/vulkan/VulkanTestContext.h
+++ b/tools/vulkan/VulkanTestContext.h
@@ -42,8 +42,8 @@ public:
 
     bool isValid() { return SkToBool(fBackendContext.get()); }
 
-    void resize() { 
-        this->createSwapchain(0, 0); 
+    void resize(uint32_t w, uint32_t h) {
+        this->createSwapchain(w, h); 
     }
 
     GrBackendContext getBackendContext() { return (GrBackendContext)fBackendContext.get(); }