Upstream the iOS WebClient

ios/web/public/web_client.h

Index: ios/web/public/web_client.h
diff --git a/ios/web/public/web_client.h b/ios/web/public/web_client.h
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+// Copyright 2014 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 IOS_WEB_PUBLIC_WEB_CLIENT_H_
+#define IOS_WEB_PUBLIC_WEB_CLIENT_H_
+
+#include <string>
+#include <vector>
+
+#include "base/strings/string16.h"
+#include "base/strings/string_piece.h"
+#include "ui/base/layout.h"
+
+namespace base {
+class RefCountedStaticMemory;
+}
+
+class GURL;
+
+#ifdef __OBJC__
+@class UIWebView;
+#else
+class UIWebView;
+#endif
+
+namespace web {
+
+class BrowserState;
+class BrowserURLRewriter;
+class WebClient;
+class WebMainParts;
+class WebViewFactory;
+
+// Setter and getter for the client.  The client should be set early, before any
+// web code is called.
+void SetWebClient(WebClient* client);
+WebClient* GetWebClient();
+
+// Interface that the embedder of the web layer implements.
+class WebClient {
+ public:
+  WebClient();
+  virtual ~WebClient();
+
+  // Allows the embedder to set a custom WebMainParts implementation for the
+  // browser startup code.
+  virtual WebMainParts* CreateWebMainParts();
+
+  // Gives the embedder a chance to perform tasks before a web view is created.
+  virtual void PreWebViewCreation() const {}
+
+  // Gives the embedder a chance to set up the given web view before presenting
+  // it in the UI.
+  virtual void PostWebViewCreation(UIWebView* web_view) const {}
+
+  // Returns a factory that vends WebViews.
+  virtual WebViewFactory* GetWebViewFactory() const;
+
+  // Returns the languages used in the Accept-Languages HTTP header.
+  // Used to decide URL formating.
+  virtual std::string GetAcceptLangs(BrowserState* state) const;
+
+  // Returns true if URL has application specific schema. Embedder must return
+  // true for every custom app specific schema it supports. For example Chromium
+  // browser would return true for "chrome://about" URL.
+  virtual bool IsAppSpecificURL(const GURL& url) const;
+
+  // Returns text to be displayed for an unsupported plug-in.
+  virtual base::string16 GetPluginNotSupportedText() const;
+
+  // Returns a string describing the embedder product name and version, of the
+  // form "productname/version".  Used as part of the user agent string.
+  virtual std::string GetProduct() const;
+
+  // Returns the user agent. |desktop_user_agent| is true if desktop user agent
+  // is requested.
+  virtual std::string GetUserAgent(bool desktop_user_agent) const;
+
+  // Returns a string resource given its id.
+  virtual base::string16 GetLocalizedString(int message_id) const;
+
+  // Returns the contents of a resource in a StringPiece given the resource id.
+  virtual base::StringPiece GetDataResource(int resource_id,
+                                            ui::ScaleFactor scale_factor) const;
+
+  // Returns the raw bytes of a scale independent data resource.
+  virtual base::RefCountedStaticMemory* GetDataResourceBytes(
+      int resource_id) const;
+
+  // Returns a list of additional WebUI schemes, if any. These additional
+  // schemes act as aliases to the about: scheme. The additional schemes may or
+  // may not serve specific WebUI pages depending on the particular
+  // URLDataSourceIOS and its override of
+  // URLDataSourceIOS::ShouldServiceRequest. For all schemes returned here,
+  // view-source is allowed.
+  virtual void GetAdditionalWebUISchemes(
+      std::vector<std::string>* additional_schemes) {}
+
+  // Gives the embedder a chance to add url rewriters to the BrowserURLRewriter
+  // singleton.
+  virtual void PostBrowserURLRewriterCreation(BrowserURLRewriter* rewriter) {}
+};
+
+}  // namespace web
+
+#endif  // IOS_WEB_PUBLIC_WEB_CLIENT_H_