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

Source/modules/webgl/CHROMIUMValuebuffer.cpp

Index: Source/modules/webgl/CHROMIUMValuebuffer.cpp
diff --git a/Source/modules/webgl/CHROMIUMValuebuffer.cpp b/Source/modules/webgl/CHROMIUMValuebuffer.cpp
index b38b053df761999ba56c5e33c89b15befd692af9..025870849312df8673516b4e1f7130d8cbdc75c3 100644
--- a/Source/modules/webgl/CHROMIUMValuebuffer.cpp
+++ b/Source/modules/webgl/CHROMIUMValuebuffer.cpp
@@ -10,14 +10,20 @@
 
 namespace blink {
 
-CHROMIUMValuebuffer* CHROMIUMValuebuffer::create(WebGLRenderingContextBase* ctx)
+PassRefPtrWillBeRawPtr<CHROMIUMValuebuffer> CHROMIUMValuebuffer::create(WebGLRenderingContextBase* ctx)
 {
-    return new CHROMIUMValuebuffer(ctx);
+    return adoptRefWillBeNoop(new CHROMIUMValuebuffer(ctx));
 }
 
 CHROMIUMValuebuffer::~CHROMIUMValuebuffer()
 {
-    // See the comment in WebGLObject::detachAndDeleteObject().
+    // Always call detach here to ensure that platform object deletion
+    // happens with Oilpan enabled. It keeps the code regular to do it
+    // with or without Oilpan enabled.
+    //
+    // See comment in WebGLBuffer's destructor for additional
+    // information on why this is done for WebGLSharedObject-derived
+    // objects.
     detachAndDeleteObject();
 }