[SharedArrayBuffer] Add "AllowShared" extended attribute, used for WebGL

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
index 38c733308892b777ddc29b8f7c58b5ea58109914..6f3d916666c3be7d573978be4508b2e33bf6fa6c 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
@@ -35,6 +35,7 @@
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMTypedArray.h"
 #include "core/dom/FlexibleArrayBufferView.h"
+#include "core/dom/NotShared.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "core/frame/ImageBitmap.h"
 #include "core/frame/LocalFrame.h"
@@ -1903,7 +1904,7 @@ void WebGLRenderingContextBase::bufferData(GLenum target,
 }
 
 void WebGLRenderingContextBase::bufferData(GLenum target,
-                                           NotShared<DOMArrayBufferView> data,
+                                           MaybeShared<DOMArrayBufferView> data,
                                            GLenum usage) {
   if (isContextLost())
     return;
@@ -2083,7 +2084,7 @@ void WebGLRenderingContextBase::compressedTexImage2D(
     GLsizei width,
     GLsizei height,
     GLint border,
-    NotShared<DOMArrayBufferView> data) {
+    MaybeShared<DOMArrayBufferView> data) {
   if (isContextLost())
     return;
   if (!ValidateTexture2DBinding("compressedTexImage2D", target))
@@ -2103,7 +2104,7 @@ void WebGLRenderingContextBase::compressedTexSubImage2D(
     GLsizei width,
     GLsizei height,
     GLenum format,
-    NotShared<DOMArrayBufferView> data) {
+    MaybeShared<DOMArrayBufferView> data) {
   if (isContextLost())
     return;
   if (!ValidateTexture2DBinding("compressedTexSubImage2D", target))
@@ -4115,7 +4116,7 @@ void WebGLRenderingContextBase::readPixels(
     GLsizei height,
     GLenum format,
     GLenum type,
-    NotShared<DOMArrayBufferView> pixels) {
+    MaybeShared<DOMArrayBufferView> pixels) {
   ReadPixelsHelper(x, y, width, height, format, type, pixels.View(), 0);
 }
 
@@ -4732,7 +4733,7 @@ void WebGLRenderingContextBase::texImage2D(
     GLint border,
     GLenum format,
     GLenum type,
-    NotShared<DOMArrayBufferView> pixels) {
+    MaybeShared<DOMArrayBufferView> pixels) {
   TexImageHelperDOMArrayBufferView(kTexImage2D, target, level, internalformat,
                                    width, height, 1, border, format, type, 0, 0,
                                    0, pixels.View(), kNullAllowed, 0);
@@ -5567,7 +5568,7 @@ void WebGLRenderingContextBase::texSubImage2D(
     GLsizei height,
     GLenum format,
     GLenum type,
-    NotShared<DOMArrayBufferView> pixels) {
+    MaybeShared<DOMArrayBufferView> pixels) {
   TexImageHelperDOMArrayBufferView(kTexSubImage2D, target, level, 0, width,
                                    height, 1, 0, format, type, xoffset, yoffset,
                                    0, pixels.View(), kNullNotAllowed, 0);
@@ -5924,7 +5925,7 @@ void WebGLRenderingContextBase::uniform4iv(const WebGLUniformLocation* location,
 void WebGLRenderingContextBase::uniformMatrix2fv(
     const WebGLUniformLocation* location,
     GLboolean transpose,
-    NotShared<DOMFloat32Array> v) {
+    MaybeShared<DOMFloat32Array> v) {
   if (isContextLost() ||
       !ValidateUniformMatrixParameters("uniformMatrix2fv", location, transpose,
                                        v.View(), 4, 0, v.View()->length()))
@@ -5948,7 +5949,7 @@ void WebGLRenderingContextBase::uniformMatrix2fv(
 void WebGLRenderingContextBase::uniformMatrix3fv(
     const WebGLUniformLocation* location,
     GLboolean transpose,
-    NotShared<DOMFloat32Array> v) {
+    MaybeShared<DOMFloat32Array> v) {
   if (isContextLost() ||
       !ValidateUniformMatrixParameters("uniformMatrix3fv", location, transpose,
                                        v.View(), 9, 0, v.View()->length()))
@@ -5972,7 +5973,7 @@ void WebGLRenderingContextBase::uniformMatrix3fv(
 void WebGLRenderingContextBase::uniformMatrix4fv(
     const WebGLUniformLocation* location,
     GLboolean transpose,
-    NotShared<DOMFloat32Array> v) {
+    MaybeShared<DOMFloat32Array> v) {
   if (isContextLost() ||
       !ValidateUniformMatrixParameters("uniformMatrix4fv", location, transpose,
                                        v.View(), 16, 0, v.View()->length()))
@@ -6036,7 +6037,7 @@ void WebGLRenderingContextBase::vertexAttrib1f(GLuint index, GLfloat v0) {
 
 void WebGLRenderingContextBase::vertexAttrib1fv(
     GLuint index,
-    NotShared<const DOMFloat32Array> v) {
+    MaybeShared<const DOMFloat32Array> v) {
   if (isContextLost())
     return;
   if (!v.View() || v.View()->length() < 1) {
@@ -6070,7 +6071,7 @@ void WebGLRenderingContextBase::vertexAttrib2f(GLuint index,
 
 void WebGLRenderingContextBase::vertexAttrib2fv(
     GLuint index,
-    NotShared<const DOMFloat32Array> v) {
+    MaybeShared<const DOMFloat32Array> v) {
   if (isContextLost())
     return;
   if (!v.View() || v.View()->length() < 2) {
@@ -6105,7 +6106,7 @@ void WebGLRenderingContextBase::vertexAttrib3f(GLuint index,
 
 void WebGLRenderingContextBase::vertexAttrib3fv(
     GLuint index,
-    NotShared<const DOMFloat32Array> v) {
+    MaybeShared<const DOMFloat32Array> v) {
   if (isContextLost())
     return;
   if (!v.View() || v.View()->length() < 3) {
@@ -6141,7 +6142,7 @@ void WebGLRenderingContextBase::vertexAttrib4f(GLuint index,
 
 void WebGLRenderingContextBase::vertexAttrib4fv(
     GLuint index,
-    NotShared<const DOMFloat32Array> v) {
+    MaybeShared<const DOMFloat32Array> v) {
   if (isContextLost())
     return;
   if (!v.View() || v.View()->length() < 4) {