InlinedVisitor: Migrate html to use inlined tracing

Source/core/html/canvas/WebGLExtension.cpp

Index: Source/core/html/canvas/WebGLExtension.cpp
diff --git a/Source/core/html/canvas/WebGLExtension.cpp b/Source/core/html/canvas/WebGLExtension.cpp
index a65b65c64ed977dd5aa08c3528aff90fcac5c2d8..ee4737b38ba56ac132df17a69df4ecc071646b5f 100644
--- a/Source/core/html/canvas/WebGLExtension.cpp
+++ b/Source/core/html/canvas/WebGLExtension.cpp
@@ -38,7 +38,7 @@ WebGLExtensionScopedContext::~WebGLExtensionScopedContext()
 {
 }
 
-void WebGLExtensionScopedContext::trace(Visitor* visitor)
+DEFINE_TRACE(WebGLExtensionScopedContext)
 {
     visitor->trace(m_context);
 }
@@ -53,7 +53,7 @@ WebGLExtension::~WebGLExtension()
 {
 }
 
-void WebGLExtension::trace(Visitor* visitor)
+DEFINE_TRACE(WebGLExtension)
 {
     visitor->trace(m_context);
 }