headless: make initial screen/window sizes configurable.

headless/public/headless_web_contents.h

 // 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.
 
 #ifndef HEADLESS_PUBLIC_HEADLESS_WEB_CONTENTS_H_
 #define HEADLESS_PUBLIC_HEADLESS_WEB_CONTENTS_H_
 
 #include <list>
 
 #include "base/callback.h"
@@ skipping 58 matching lines @@
  public:
   ~Builder();
   Builder(Builder&&);
 
   // Set an initial URL to ensure that the renderer gets initialized and
   // eventually becomes ready to be inspected. See
   // HeadlessWebContents::Observer::DevToolsTargetReady. The default URL is
   // about:blank.
   Builder& SetInitialURL(const GURL& initial_url);
 
-  // Specify the initial window size (default is 800x600).
+  // Specify the initial window size (default is configured in browser options).
   Builder& SetWindowSize(const gfx::Size& size);
 
   // Set a browser context for storing session data (e.g., cookies, cache, local
   // storage) for the tab. Several tabs can share the same browser context. If
   // unset, the default browser context will be used. The browser context must
   // outlive this HeadlessWebContents.
   Builder& SetBrowserContext(HeadlessBrowserContext* browser_context);
 
   // Specify an embedder provided Mojo service to be installed.  The
   // |service_factory| callback is called on demand by Mojo to instantiate the
@@ skipping 38 matching lines @@
     base::Callback<void(mojo::ScopedMessagePipeHandle)> service_factory;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(MojoService);
   };
 
   explicit Builder(HeadlessBrowserImpl* browser);
 
   HeadlessBrowserImpl* browser_;
   GURL initial_url_ = GURL("about:blank");
-  gfx::Size window_size_ = gfx::Size(800, 600);
+  gfx::Size window_size_;
   HeadlessBrowserContext* browser_context_;
   std::list<MojoService> mojo_services_;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_PUBLIC_HEADLESS_WEB_CONTENTS_H_