IDL: Add [FlexibleArrayBufferView] and use for bufferSubData

Source/core/html/canvas/WebGLRenderingContextBase.cpp

Index: Source/core/html/canvas/WebGLRenderingContextBase.cpp
diff --git a/Source/core/html/canvas/WebGLRenderingContextBase.cpp b/Source/core/html/canvas/WebGLRenderingContextBase.cpp
index 6c7ef4a61200aa725abc1486c827a51c0fb337a0..a0f2e046947514749bff3f11878e0607217445d1 100644
--- a/Source/core/html/canvas/WebGLRenderingContextBase.cpp
+++ b/Source/core/html/canvas/WebGLRenderingContextBase.cpp
@@ -32,6 +32,7 @@
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMTypedArray.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/dom/FlexibleArrayBufferView.h"
 #include "core/fetch/ImageResource.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
@@ -1356,13 +1357,13 @@ void WebGLRenderingContextBase::bufferSubData(GLenum target, long long offset, D
     bufferSubDataImpl(target, offset, data->byteLength(), data->data());
 }
 
-void WebGLRenderingContextBase::bufferSubData(GLenum target, long long offset, DOMArrayBufferView* data)
+void WebGLRenderingContextBase::bufferSubData(GLenum target, long long offset, const FlexibleArrayBufferView& data)
 {
     if (isContextLost())
         return;
     if (!data)
         return;
-    bufferSubDataImpl(target, offset, data->byteLength(), data->baseAddress());
+    bufferSubDataImpl(target, offset, data.byteLength(), data.baseAddress());
 }
 
 GLenum WebGLRenderingContextBase::checkFramebufferStatus(GLenum target)