[headless] Remove default browser context.

headless/public/headless_browser_context.h

 // Copyright 2016 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_BROWSER_CONTEXT_H_
 #define HEADLESS_PUBLIC_HEADLESS_BROWSER_CONTEXT_H_
 
 #include <list>
+#include <memory>
+#include <string>
+#include <unordered_map>
+#include <vector>
 
+#include "base/optional.h"
 #include "headless/public/headless_export.h"
+#include "headless/public/headless_web_contents.h"
+#include "net/base/host_port_pair.h"
 #include "net/url_request/url_request_job_factory.h"
 
 namespace headless {
 class HeadlessBrowserImpl;
+class HeadlessBrowserContextOptions;
 
 using ProtocolHandlerMap = std::unordered_map<
     std::string,
     std::unique_ptr<net::URLRequestJobFactory::ProtocolHandler>>;
 
 // Represents an isolated session with a unique cache, cookies, and other
 // profile/session related data.

[Sami, 2016/08/03 11:20:31]

Please add a note saying when a browser context is deleted, all the associated
tabs are closed too.

[altimin, 2016/08/03 11:54:10]

Done.

 class HEADLESS_EXPORT HeadlessBrowserContext {
  public:
   class Builder;
 
   virtual ~HeadlessBrowserContext() {}
 
+  // Open a new tab. Returns a builder object which can be used to set
+  // properties for the new tab.
+  virtual HeadlessWebContents::Builder CreateWebContentsBuilder() = 0;
+
+  virtual std::vector<HeadlessWebContents*> GetAllWebContents() = 0;
+
   // TODO(skyostil): Allow saving and restoring contexts (crbug.com/617931).
 
  protected:
   HeadlessBrowserContext() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HeadlessBrowserContext);
 };
 
-// TODO(alexclarke): We should support this builder for the default context.
 class HEADLESS_EXPORT HeadlessBrowserContext::Builder {
  public:
   Builder(Builder&&);
   ~Builder();
 
   // Set custom network protocol handlers. These can be used to override URL
   // fetching for different network schemes.
   Builder& SetProtocolHandlers(ProtocolHandlerMap protocol_handlers);
 
   // Specify JS mojo module bindings to be installed, one per mojom file.
   // Note a single mojom file could potentially define many interfaces.
   // |mojom_name| the name including path of the .mojom file.
   // |js_bindings| compiletime generated javascript bindings. Typically loaded
   // from gen/path/name.mojom.js.
   Builder& AddJsMojoBindings(const std::string& mojom_name,
                              const std::string& js_bindings);
 
   // By default if you add mojo bindings, http and https are disabled because
   // its almost certinly unsafe for arbitary sites on the internet to have
   // access to these bindings.  If you know what you're doing it may be OK to
   // turn them back on. E.g. if headless_lib is being used in a testing
   // framework which serves the web content from disk that's likely ok.
   //
   // That said, best pratice is to add a ProtocolHandler to serve the
   // webcontent over a custom protocol. That way you can be sure that only the
   // things you intend have access to mojo.
   Builder& EnableUnsafeNetworkAccessWithMojoBindings(
       bool enable_http_and_https_if_mojo_used);
 
+  // Set HeadlessBrowser::Builder::SetUserAgent.

[Sami, 2016/08/03 11:20:31]

How about formatting this thusly:

// By default HeadlessBrowserContext inherits the following options from 
// the browser instance. The methods below can be used to override these 
// settings. See HeadlessBrowser::Builder for their meaning.
Builder& SetUserAgent(const std::string& user_agent);
Builder& SetHostResolverRules(const std::string&
Builder& SetUserDataDir(const base::FilePath& user_data_dir);
...

[altimin, 2016/08/03 11:54:10]

Done.

+  Builder& SetUserAgent(const std::string& user_agent);
+
+  // See HeadlessBrowser::Builder::SetProxyServer.
+  Builder& SetProxyServer(const net::HostPortPair& proxy_server);
+
+  // See HeadlessBrowser::Builder::SetHostResolverRules.
+  Builder& SetHostResolverRules(const std::string& host_resolver_rules);
+
+  // See HeadlessBrowser::Builder::SetUserDataDir.
+  Builder& SetUserDataDir(const base::FilePath& user_data_dir);
+
   std::unique_ptr<HeadlessBrowserContext> Build();
 
  private:
   friend class HeadlessBrowserImpl;
 
+  explicit Builder(HeadlessBrowserImpl* browser);
+
   struct MojoBindings {
     MojoBindings();
     MojoBindings(const std::string& mojom_name, const std::string& js_bindings);
     ~MojoBindings();
 
     std::string mojom_name;
     std::string js_bindings;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(MojoBindings);
   };
 
-  explicit Builder(HeadlessBrowserImpl* browser);
+  HeadlessBrowserImpl* browser_;
+  std::unique_ptr<HeadlessBrowserContextOptions> options_;
 
-  HeadlessBrowserImpl* browser_;
-  ProtocolHandlerMap protocol_handlers_;
   std::list<MojoBindings> mojo_bindings_;
   bool enable_http_and_https_if_mojo_used_;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_PUBLIC_HEADLESS_BROWSER_CONTEXT_H_