Merge 92908 - Readback composited webgl results for printing

Source/WebCore/platform/graphics/chromium/Extensions3DChromium.h

Index: Source/WebCore/platform/graphics/chromium/Extensions3DChromium.h
===================================================================
--- Source/WebCore/platform/graphics/chromium/Extensions3DChromium.h	(revision 93076)
+++ Source/WebCore/platform/graphics/chromium/Extensions3DChromium.h	(working copy)
@@ -31,6 +31,7 @@
 namespace WebCore {
 
 class GraphicsContext3DInternal;
+class ImageBuffer;
 
 class Extensions3DChromium : public Extensions3D {
 public:
@@ -44,6 +45,7 @@
     //   GL_CHROMIUM_latch
     //   GL_CHROMIUM_swapbuffers_complete_callback
     //   GL_CHROMIUM_rate_limit_offscreen_context
+    //   GL_CHROMIUM_paint_framebuffer_canvas
 
     // Extensions3D methods.
     virtual bool supports(const String&);
@@ -89,6 +91,9 @@
     // GL_CHROMIUM_rate_limit_offscreen_context
     void rateLimitOffscreenContextCHROMIUM();
 
+    // GL_CHROMIUM_paint_framebuffer_canvas
+    void paintFramebufferToCanvas(int framebuffer, int width, int height, bool premultiplyAlpha, ImageBuffer*);
+
 private:
     // Instances of this class are strictly owned by the GraphicsContext3D implementation and do not
     // need to be instantiated by any other code.