Revert 189969 "Add RenderWidgetHost::GetSnapshotFromRenderer met..."

content/browser/renderer_host/render_widget_host_view_gtk.cc

Index: content/browser/renderer_host/render_widget_host_view_gtk.cc
===================================================================
--- content/browser/renderer_host/render_widget_host_view_gtk.cc	(revision 190011)
+++ content/browser/renderer_host/render_widget_host_view_gtk.cc	(working copy)
@@ -1051,9 +1051,47 @@
     const gfx::Rect& src_subrect,
     const gfx::Size& /* dst_size */,
     const base::Callback<void(bool, const SkBitmap&)>& callback) {
-  // Grab the snapshot from the renderer as that's the only reliable way to
-  // readback from the GPU for this platform right now.
-  GetRenderWidgetHost()->GetSnapshotFromRenderer(src_subrect, callback);
+  base::ScopedClosureRunner scoped_callback_runner(
+      base::Bind(callback, false, SkBitmap()));
+
+  XID parent_window = ui::GetParentWindow(compositing_surface_);
+  if (parent_window == None)
+    return;
+
+  // Get the window offset with respect to its parent.
+  XWindowAttributes attr;
+  if (!XGetWindowAttributes(ui::GetXDisplay(), compositing_surface_, &attr))
+    return;
+
+  gfx::Rect src_subrect_in_parent(src_subrect);
+  src_subrect_in_parent.Offset(attr.x, attr.y);
+
+  ui::XScopedImage image(XGetImage(ui::GetXDisplay(), parent_window,
+                                   src_subrect_in_parent.x(),
+                                   src_subrect_in_parent.y(),
+                                   src_subrect_in_parent.width(),
+                                   src_subrect_in_parent.height(),
+                                   AllPlanes, ZPixmap));
+  if (!image.get())
+    return;
+
+  SkBitmap bitmap;
+  bitmap.setConfig(SkBitmap::kARGB_8888_Config,
+                   image->width,
+                   image->height,
+                   image->bytes_per_line);
+  if (!bitmap.allocPixels())
+    return;
+  bitmap.setIsOpaque(true);
+
+  const size_t bitmap_size = bitmap.getSize();
+  DCHECK_EQ(bitmap_size,
+            static_cast<size_t>(image->height * image->bytes_per_line));
+  unsigned char* pixels = static_cast<unsigned char*>(bitmap.getPixels());
+  memcpy(pixels, image->data, bitmap_size);
+
+  scoped_callback_runner.Release();
+  callback.Run(true, bitmap);
 }
 
 void RenderWidgetHostViewGtk::CopyFromCompositingSurfaceToVideoFrame(