[wrapper-tracing] Fix WebGL extension and attachment handling

third_party/WebKit/Source/modules/webgl/WebGLFramebuffer.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGLFramebuffer.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLFramebuffer.cpp b/third_party/WebKit/Source/modules/webgl/WebGLFramebuffer.cpp
index 9a4b8221b9a2d54dadf53312df978e56eb32787d..305b366fbb608056afd07107627131731cfa6de4 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLFramebuffer.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLFramebuffer.cpp
@@ -40,10 +40,13 @@ class WebGLRenderbufferAttachment final
   static WebGLFramebuffer::WebGLAttachment* create(WebGLRenderbuffer*);
 
   DECLARE_VIRTUAL_TRACE();
+  DEFINE_INLINE_VIRTUAL_TRACE_WRAPPERS() {
+    visitor->traceWrappers(m_renderbuffer);
+  }
 
  private:
   explicit WebGLRenderbufferAttachment(WebGLRenderbuffer*);
-  WebGLRenderbufferAttachment() {}
+  WebGLRenderbufferAttachment() : m_renderbuffer(this, nullptr) {}
 
   WebGLSharedObject* object() const override;
   bool isSharedObject(WebGLSharedObject*) const override;
@@ -56,7 +59,7 @@ class WebGLRenderbufferAttachment final
                 GLenum target,
                 GLenum attachment) override;
 
-  Member<WebGLRenderbuffer> m_renderbuffer;
+  TraceWrapperMember<WebGLRenderbuffer> m_renderbuffer;

[haraken, 2016/11/30 14:30:35]

How did you notice that these things need to be TraceWrapperMember?

[Michael Lippautz, 2016/11/30 15:09:06]

visitChildDOMWrappers on WebGLFrameBuffer and the *ContextBase.

 };
 
 WebGLFramebuffer::WebGLAttachment* WebGLRenderbufferAttachment::create(
@@ -71,7 +74,7 @@ DEFINE_TRACE(WebGLRenderbufferAttachment) {
 
 WebGLRenderbufferAttachment::WebGLRenderbufferAttachment(
     WebGLRenderbuffer* renderbuffer)
-    : m_renderbuffer(renderbuffer) {}
+    : m_renderbuffer(this, renderbuffer) {}
 
 WebGLSharedObject* WebGLRenderbufferAttachment::object() const {
   return m_renderbuffer->object() ? m_renderbuffer.get() : 0;
@@ -111,13 +114,14 @@ class WebGLTextureAttachment final : public WebGLFramebuffer::WebGLAttachment {
                                                    GLint layer);
 
   DECLARE_VIRTUAL_TRACE();
+  DEFINE_INLINE_VIRTUAL_TRACE_WRAPPERS() { visitor->traceWrappers(m_texture); }
 
  private:
   WebGLTextureAttachment(WebGLTexture*,
                          GLenum target,
                          GLint level,
                          GLint layer);
-  WebGLTextureAttachment() {}
+  WebGLTextureAttachment() : m_texture(this, nullptr) {}
 
   WebGLSharedObject* object() const override;
   bool isSharedObject(WebGLSharedObject*) const override;
@@ -130,7 +134,7 @@ class WebGLTextureAttachment final : public WebGLFramebuffer::WebGLAttachment {
                 GLenum target,
                 GLenum attachment) override;
 
-  Member<WebGLTexture> m_texture;
+  TraceWrapperMember<WebGLTexture> m_texture;
   GLenum m_target;
   GLint m_level;
   GLint m_layer;
@@ -153,7 +157,10 @@ WebGLTextureAttachment::WebGLTextureAttachment(WebGLTexture* texture,
                                                GLenum target,
                                                GLint level,
                                                GLint layer)
-    : m_texture(texture), m_target(target), m_level(level), m_layer(layer) {}
+    : m_texture(this, texture),
+      m_target(target),
+      m_level(level),
+      m_layer(layer) {}
 
 WebGLSharedObject* WebGLTextureAttachment::object() const {
   return m_texture->object() ? m_texture.get() : 0;