Add compressedTex{Sub}Image{2|3}D using PBO signatures to WebGL2

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl

Index: third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl
diff --git a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl
index 1a1bc79eac24b16570c7a1704eb54839bd4c6c17..adfb7fe848caf44c1eb99dcf16c2bd24ff451bb0 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl
+++ b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl
@@ -337,6 +337,19 @@ typedef unsigned long long GLuint64;
     void compressedTexImage3D(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, ArrayBufferView data, optional GLuint srcOffset = 0, optional GLuint srcLengthOverride = 0);
     void compressedTexSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, ArrayBufferView data, optional GLuint srcOffset = 0, optional GLuint srcLengthOverride = 0);
 
+    void compressedTexImage2D(GLenum target, GLint level, GLenum internalformat,
+                              GLsizei width, GLsizei height, GLint border,
+                              GLsizei imageSize, GLintptr offset);
+    void compressedTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                                 GLsizei width, GLsizei height, GLenum format,
+                                 GLsizei imageSize, GLintptr offset);
+    void compressedTexImage3D(GLenum target, GLint level, GLenum internalformat,
+                              GLsizei width, GLsizei height, GLsizei depth, GLint border,
+                              GLsizei imageSize, GLintptr offset);
+    void compressedTexSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+                                 GLsizei width, GLsizei height, GLsizei depth, GLenum format,
+                                 GLsizei imageSize, GLintptr offset);
+
     /* Programs and shaders */
     GLint getFragDataLocation(WebGLProgram program, DOMString name);