Revert of [Oilpan] Migrate classes under module/webgl onto oilpan heap

Source/modules/webgl/WebGLFramebuffer.h

Index: Source/modules/webgl/WebGLFramebuffer.h
diff --git a/Source/modules/webgl/WebGLFramebuffer.h b/Source/modules/webgl/WebGLFramebuffer.h
index 1f2eef44f993c19c0252727ee12aa1593429ba3a..a2cd23d861b955d2febb174dcd47448dd6d0bc07 100644
--- a/Source/modules/webgl/WebGLFramebuffer.h
+++ b/Source/modules/webgl/WebGLFramebuffer.h
@@ -28,6 +28,8 @@
 
 #include "modules/webgl/WebGLContextObject.h"
 #include "modules/webgl/WebGLSharedObject.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefCounted.h"
 
 namespace blink {
 
@@ -37,7 +39,7 @@
 class WebGLFramebuffer final : public WebGLContextObject {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    class WebGLAttachment : public GarbageCollectedFinalized<WebGLAttachment> {
+    class WebGLAttachment : public RefCountedWillBeGarbageCollectedFinalized<WebGLAttachment> {
     public:
         virtual ~WebGLAttachment();
 
@@ -64,7 +66,7 @@
 
     ~WebGLFramebuffer() override;
 
-    static WebGLFramebuffer* create(WebGLRenderingContextBase*);
+    static PassRefPtrWillBeRawPtr<WebGLFramebuffer> create(WebGLRenderingContextBase*);
 
     Platform3DObject object() const { return m_object; }
 
@@ -132,7 +134,7 @@
 
     Platform3DObject m_object;
 
-    typedef HeapHashMap<GLenum, Member<WebGLAttachment>> AttachmentMap;
+    typedef WillBeHeapHashMap<GLenum, RefPtrWillBeMember<WebGLAttachment>> AttachmentMap;
 
     AttachmentMap m_attachments;