Avoid GPU readback in tex(Sub)Image2D(ImageBitmap)

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

Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h
index 6a6377ed4f407666959bd0a14f4f30a9f9c859df..c344ac6a18c14524635095d045e9b08d476eb19a 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h
+++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h
@@ -794,10 +794,11 @@ protected:
     void texImageImpl(TexImageFunctionID, GLenum target, GLint level, GLint internalformat, GLint xoffset, GLint yoffset, GLint zoffset,
         GLenum format, GLenum type, Image*, WebGLImageConversion::ImageHtmlDomSource, bool flipY, bool premultiplyAlpha);
 
-    // Copy from the canvas element directly to the texture via the GPU, without a read-back to system memory.
-    void texImageCanvasByGPU(TexImageByGPUType, WebGLTexture*, GLenum target, GLint level,
-        GLint internalformat, GLenum type, GLint xoffset, GLint yoffset, GLint zoffset, HTMLCanvasElement*);
-    virtual bool canUseTexImageCanvasByGPU(GLint internalformat, GLenum type);
+    // Copy from the source directly to the texture via the gpu, without a read-back to system memory.
+    // Souce could be canvas or imageBitmap.
+    void texImageByGPU(TexImageByGPUType, WebGLTexture*, GLenum target, GLint level, GLint internalformat,
+        GLenum type, GLint xoffset, GLint yoffset, GLint zoffset, HTMLCanvasElement*, ImageBitmap*);
+    virtual bool canUseTexImageByGPU(GLint internalformat, GLenum type);
 
     virtual WebGLImageConversion::PixelStoreParams getPackPixelStoreParams();
     virtual WebGLImageConversion::PixelStoreParams getUnpackPixelStoreParams(TexImageDimension);
@@ -1109,6 +1110,8 @@ protected:
 private:
     WebGLRenderingContextBase(HTMLCanvasElement*, OffscreenCanvas*, PassOwnPtr<WebGraphicsContext3DProvider>, const WebGLContextAttributes&);
     static PassOwnPtr<WebGraphicsContext3DProvider> createContextProviderInternal(HTMLCanvasElement*, ScriptState*, WebGLContextAttributes, unsigned);
+    void texImageCanvasByGPU(HTMLCanvasElement*, GLuint, GLenum, GLenum, GLint);
+    void texImageBitmapByGPU(ImageBitmap*, GLuint, GLenum, GLenum, GLint);
 };
 
 DEFINE_TYPE_CASTS(WebGLRenderingContextBase, CanvasRenderingContext, context, context->is3d(), context.is3d());