Oilpan: move 2D Canvas and WebGL objects to the heap.

Source/core/html/canvas/WebGLTexture.cpp

Index: Source/core/html/canvas/WebGLTexture.cpp
diff --git a/Source/core/html/canvas/WebGLTexture.cpp b/Source/core/html/canvas/WebGLTexture.cpp
index c2c8929777e371a661e0636822dee91bfd7d4c7e..e290aefecebd9f7c03ff4fcecb6fae510ace5299 100644
--- a/Source/core/html/canvas/WebGLTexture.cpp
+++ b/Source/core/html/canvas/WebGLTexture.cpp
@@ -31,9 +31,9 @@
 
 namespace blink {
 
-PassRefPtr<WebGLTexture> WebGLTexture::create(WebGLRenderingContextBase* ctx)
+PassRefPtrWillBeRawPtr<WebGLTexture> WebGLTexture::create(WebGLRenderingContextBase* ctx)
 {
-    return adoptRef(new WebGLTexture(ctx));
+    return adoptRefWillBeNoop(new WebGLTexture(ctx));
 }
 
 WebGLTexture::WebGLTexture(WebGLRenderingContextBase* ctx)
@@ -56,7 +56,14 @@ WebGLTexture::WebGLTexture(WebGLRenderingContextBase* ctx)
 
 WebGLTexture::~WebGLTexture()
 {
-    deleteObject(0);
+    // Always perform 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();
 }
 
 void WebGLTexture::setTarget(GLenum target, GLint maxLevel)