DevTools: Add feature to capture full-height screenshots

content/browser/devtools/protocol/emulation_handler.cc

Index: content/browser/devtools/protocol/emulation_handler.cc
diff --git a/content/browser/devtools/protocol/emulation_handler.cc b/content/browser/devtools/protocol/emulation_handler.cc
index 764dc5edbbee6fbc846b271b0060645062f932b3..94037e2ee82ba3b9a850ccd6edbb53dd16da11c6 100644
--- a/content/browser/devtools/protocol/emulation_handler.cc
+++ b/content/browser/devtools/protocol/emulation_handler.cc
@@ -247,6 +247,10 @@ Response EmulationHandler::SetVisibleSize(int width, int height) {
   if (!widget_host)
     return Response::Error("Target does not support setVisibleSize");
 
+  if (width == 0)
+    width = widget_host->GetView()->GetViewBounds().width();
+  if (height == 0)
+    height = widget_host->GetView()->GetViewBounds().height();
   widget_host->GetView()->SetSize(gfx::Size(width, height));
   return Response::OK();
 }