DevTools: Add feature to capture full-height screenshots

content/browser/devtools/protocol/emulation_handler.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/devtools/protocol/emulation_handler.h"
 
 #include <utility>
 
 #include "base/strings/string_number_conversions.h"
 #include "build/build_config.h"
@@ skipping 229 matching lines @@
 Response EmulationHandler::SetVisibleSize(int width, int height) {
   if (width < 0 || height < 0)
     return Response::InvalidParams("Width and height must be non-negative");
 
   // Set size of frame by resizing RWHV if available.
   RenderWidgetHostImpl* widget_host =
       host_ ? host_->GetRenderWidgetHost() : nullptr;
   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();
 }
 
 WebContentsImpl* EmulationHandler::GetWebContents() {
   return host_ ?
       static_cast<WebContentsImpl*>(WebContents::FromRenderFrameHost(host_)) :
       nullptr;
 }
 
@@ skipping 19 matching lines @@
     widget_host->Send(new ViewMsg_EnableDeviceEmulation(
         widget_host->GetRoutingID(), device_emulation_params_));
   } else {
     widget_host->Send(new ViewMsg_DisableDeviceEmulation(
         widget_host->GetRoutingID()));
   }
 }
 
 }  // namespace protocol
 }  // namespace content