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

Source/modules/webgl/WebGLSampler.cpp

Index: Source/modules/webgl/WebGLSampler.cpp
diff --git a/Source/modules/webgl/WebGLSampler.cpp b/Source/modules/webgl/WebGLSampler.cpp
index 338c672281350c73b91f8bae6e3594cf2e0d2691..08e4aedba3905c323970adcb29469ca1d62d55d2 100644
--- a/Source/modules/webgl/WebGLSampler.cpp
+++ b/Source/modules/webgl/WebGLSampler.cpp
@@ -10,16 +10,14 @@
 
 namespace blink {
 
-PassRefPtrWillBeRawPtr<WebGLSampler> WebGLSampler::create(WebGL2RenderingContextBase* ctx)
+WebGLSampler* WebGLSampler::create(WebGL2RenderingContextBase* ctx)
 {
-    return adoptRefWillBeNoop(new WebGLSampler(ctx));
+    return new WebGLSampler(ctx);
 }
 
 WebGLSampler::~WebGLSampler()
 {
-    // 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.
+    // Call detach here to ensure that platform object deletion happens.
     //
     // See comment in WebGLBuffer's destructor for additional
     // information on why this is done for WebGLSharedObject-derived