headless: make initial screen/window sizes configurable.

headless/lib/browser/headless_browser_impl.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 "headless/lib/browser/headless_browser_impl.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 109 matching lines @@
 }
 
 void HeadlessBrowserImpl::set_browser_main_parts(
     HeadlessBrowserMainParts* browser_main_parts) {
   DCHECK(!browser_main_parts_);
   browser_main_parts_ = browser_main_parts;
 }
 
 void HeadlessBrowserImpl::RunOnStartCallback() {
   DCHECK(aura::Env::GetInstance());
-  // TODO(eseckler): allow configuration of window (viewport) size by embedder.
-  const gfx::Size kDefaultSize(800, 600);
   window_tree_host_.reset(
-      aura::WindowTreeHost::Create(gfx::Rect(kDefaultSize)));
+      aura::WindowTreeHost::Create(gfx::Rect(options()->window_size)));
   window_tree_host_->InitHost();
 
   window_tree_client_.reset(
       new HeadlessWindowTreeClient(window_tree_host_->window()));
 
   on_start_callback_.Run(this);
   on_start_callback_ = base::Callback<void(HeadlessBrowser*)>();
 }
 
 HeadlessWebContentsImpl* HeadlessBrowserImpl::RegisterWebContents(
@@ skipping 49 matching lines @@
 
   // Child processes should not end up here.
   base::CommandLine command_line(options.argc, options.argv);
   DCHECK(!command_line.HasSwitch(switches::kProcessType));
 #endif
   return RunContentMain(std::move(options),
                         std::move(on_browser_start_callback));
 }
 
 }  // namespace headless