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

Source/modules/webgl/WebGLShaderPrecisionFormat.h

Index: Source/modules/webgl/WebGLShaderPrecisionFormat.h
diff --git a/Source/modules/webgl/WebGLShaderPrecisionFormat.h b/Source/modules/webgl/WebGLShaderPrecisionFormat.h
index 1b2c998681e0bdf74bbe69edea60ae0e1cb3ffce..fc8d9d21c317500b04a9b1439136009fd874a13c 100644
--- a/Source/modules/webgl/WebGLShaderPrecisionFormat.h
+++ b/Source/modules/webgl/WebGLShaderPrecisionFormat.h
@@ -30,15 +30,13 @@
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/graphics/GraphicsTypes3D.h"
 #include "platform/heap/Handle.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
 
 namespace blink {
 
-class WebGLShaderPrecisionFormat final : public RefCountedWillBeGarbageCollected<WebGLShaderPrecisionFormat>, public ScriptWrappable {
+class WebGLShaderPrecisionFormat final : public GarbageCollected<WebGLShaderPrecisionFormat>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<WebGLShaderPrecisionFormat> create(GLint rangeMin, GLint rangeMax, GLint precision);
+    static WebGLShaderPrecisionFormat* create(GLint rangeMin, GLint rangeMax, GLint precision);
 
     GLint rangeMin() const;
     GLint rangeMax() const;