reland crrev.com/212927 Move webkitplatformsupport_impl and related from glue to child

webkit/glue/resource_loader_bridge.h

-// Copyright (c) 2012 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.
-//
-// The intent of this file is to provide a type-neutral abstraction between
-// Chrome and WebKit for resource loading. This pure-virtual interface is
-// implemented by the embedder.
-//
-// One of these objects will be created by WebKit for each request. WebKit
-// will own the pointer to the bridge, and will delete it when the request is
-// no longer needed.
-//
-// In turn, the bridge's owner on the WebKit end will implement the Peer
-// interface, which we will use to communicate notifications back.
-
-#ifndef WEBKIT_GLUE_RESOURCE_LOADER_BRIDGE_H_
-#define WEBKIT_GLUE_RESOURCE_LOADER_BRIDGE_H_
-
-#include <utility>
-
-#include "build/build_config.h"
-#if defined(OS_POSIX)
-#include "base/file_descriptor_posix.h"
-#endif
-#include "base/memory/ref_counted.h"
-#include "base/platform_file.h"
-#include "base/values.h"
-#include "net/base/request_priority.h"
-#include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
-#include "third_party/WebKit/public/platform/WebURLRequest.h"
-#include "url/gurl.h"
-#include "webkit/common/resource_response_info.h"
-#include "webkit/glue/resource_type.h"
-#include "webkit/glue/webkit_glue_export.h"
-
-namespace webkit_glue {
-class ResourceRequestBody;
-
-class ResourceLoaderBridge {
- public:
-  // Structure used when calling
-  // WebKitPlatformSupportImpl::CreateResourceLoader().
-  struct WEBKIT_GLUE_EXPORT RequestInfo {
-    RequestInfo();
-    ~RequestInfo();
-
-    // HTTP-style method name (e.g., "GET" or "POST").
-    std::string method;
-
-    // Absolute URL encoded in ASCII per the rules of RFC-2396.
-    GURL url;
-
-    // URL of the document in the top-level window, which may be checked by the
-    // third-party cookie blocking policy.
-    GURL first_party_for_cookies;
-
-    // Optional parameter, a URL with similar constraints in how it must be
-    // encoded as the url member.
-    GURL referrer;
-
-    // The referrer policy that applies to the referrer.
-    WebKit::WebReferrerPolicy referrer_policy;
-
-    // For HTTP(S) requests, the headers parameter can be a \r\n-delimited and
-    // \r\n-terminated list of MIME headers.  They should be ASCII-encoded using
-    // the standard MIME header encoding rules.  The headers parameter can also
-    // be null if no extra request headers need to be set.
-    std::string headers;
-
-    // Composed of the values defined in url_request_load_flags.h.
-    int load_flags;
-
-    // Process id of the process making the request.
-    int requestor_pid;
-
-    // Indicates if the current request is the main frame load, a sub-frame
-    // load, or a sub objects load.
-    ResourceType::Type request_type;
-
-    // Indicates the priority of this request, as determined by WebKit.
-    net::RequestPriority priority;
-
-    // Used for plugin to browser requests.
-    uint32 request_context;
-
-    // Identifies what appcache host this request is associated with.
-    int appcache_host_id;
-
-    // Used to associated the bridge with a frame's network context.
-    int routing_id;
-
-    // If true, then the response body will be downloaded to a file and the
-    // path to that file will be provided in ResponseInfo::download_file_path.
-    bool download_to_file;
-
-    // True if the request was user initiated.
-    bool has_user_gesture;
-
-    // Extra data associated with this request.  We do not own this pointer.
-    WebKit::WebURLRequest::ExtraData* extra_data;
-
-   private:
-    DISALLOW_COPY_AND_ASSIGN(RequestInfo);
-  };
-
-  // See the SyncLoad method declared below.  (The name of this struct is not
-  // suffixed with "Info" because it also contains the response data.)
-  struct SyncLoadResponse : ResourceResponseInfo {
-    SyncLoadResponse();
-    ~SyncLoadResponse();
-
-    // The response error code.
-    int error_code;
-
-    // The final URL of the response.  This may differ from the request URL in
-    // the case of a server redirect.
-    GURL url;
-
-    // The response data.
-    std::string data;
-  };
-
-  // Generated by the bridge. This is implemented by our custom resource loader
-  // within webkit. The Peer and it's bridge should have identical lifetimes
-  // as they represent each end of a communication channel.
-  //
-  // These callbacks mirror net::URLRequest::Delegate and the order and
-  // conditions in which they will be called are identical. See url_request.h
-  // for more information.
-  class Peer {
-   public:
-    // Called as upload progress is made.
-    // note: only for requests with LOAD_ENABLE_UPLOAD_PROGRESS set
-    virtual void OnUploadProgress(uint64 position, uint64 size) = 0;
-
-    // Called when a redirect occurs.  The implementation may return false to
-    // suppress the redirect.  The given ResponseInfo provides complete
-    // information about the redirect, and new_url is the URL that will be
-    // loaded if this method returns true.  If this method returns true, the
-    // output parameter *has_new_first_party_for_cookies indicates whether the
-    // output parameter *new_first_party_for_cookies contains the new URL that
-    // should be consulted for the third-party cookie blocking policy.
-    virtual bool OnReceivedRedirect(const GURL& new_url,
-                                    const ResourceResponseInfo& info,
-                                    bool* has_new_first_party_for_cookies,
-                                    GURL* new_first_party_for_cookies) = 0;
-
-    // Called when response headers are available (after all redirects have
-    // been followed).
-    virtual void OnReceivedResponse(const ResourceResponseInfo& info) = 0;
-
-    // Called when a chunk of response data is downloaded.  This method may be
-    // called multiple times or not at all if an error occurs.  This method is
-    // only called if RequestInfo::download_to_file was set to true, and in
-    // that case, OnReceivedData will not be called.
-    virtual void OnDownloadedData(int len) = 0;
-
-    // Called when a chunk of response data is available. This method may
-    // be called multiple times or not at all if an error occurs.
-    // The encoded_data_length is the length of the encoded data transferred
-    // over the network, which could be different from data length (e.g. for
-    // gzipped content), or -1 if if unknown.
-    virtual void OnReceivedData(const char* data,
-                                int data_length,
-                                int encoded_data_length) = 0;
-
-    // Called when metadata generated by the renderer is retrieved from the
-    // cache. This method may be called zero or one times.
-    virtual void OnReceivedCachedMetadata(const char* data, int len) { }
-
-    // Called when the response is complete.  This method signals completion of
-    // the resource load.
-    virtual void OnCompletedRequest(
-        int error_code,
-        bool was_ignored_by_handler,
-        const std::string& security_info,
-        const base::TimeTicks& completion_time) = 0;
-
-   protected:
-    virtual ~Peer() {}
-  };
-
-  // use WebKitPlatformSupportImpl::CreateResourceLoader() for construction, but
-  // anybody can delete at any time, INCLUDING during processing of callbacks.
-  WEBKIT_GLUE_EXPORT virtual ~ResourceLoaderBridge();
-
-  // Call this method before calling Start() to set the request body.
-  // May only be used with HTTP(S) POST requests.
-  virtual void SetRequestBody(ResourceRequestBody* request_body) = 0;
-
-  // Call this method to initiate the request.  If this method succeeds, then
-  // the peer's methods will be called asynchronously to report various events.
-  virtual bool Start(Peer* peer) = 0;
-
-  // Call this method to cancel a request that is in progress.  This method
-  // causes the request to immediately transition into the 'done' state. The
-  // OnCompletedRequest method will be called asynchronously; this assumes
-  // the peer is still valid.
-  virtual void Cancel() = 0;
-
-  // Call this method to suspend or resume a load that is in progress.  This
-  // method may only be called after a successful call to the Start method.
-  virtual void SetDefersLoading(bool value) = 0;
-
-  // Call this method when the priority of the requested resource changes after
-  // Start() has been called.  This method may only be called after a successful
-  // call to the Start method.
-  virtual void DidChangePriority(net::RequestPriority new_priority) = 0;
-
-  // Call this method to load the resource synchronously (i.e., in one shot).
-  // This is an alternative to the Start method.  Be warned that this method
-  // will block the calling thread until the resource is fully downloaded or an
-  // error occurs.  It could block the calling thread for a long time, so only
-  // use this if you really need it!  There is also no way for the caller to
-  // interrupt this method.  Errors are reported via the status field of the
-  // response parameter.
-  virtual void SyncLoad(SyncLoadResponse* response) = 0;
-
- protected:
-  // Construction must go through
-  // WebKitPlatformSupportImpl::CreateResourceLoader()
-  // For HTTP(S) POST requests, the AppendDataToUpload and AppendFileToUpload
-  // methods may be called to construct the body of the request.
-  WEBKIT_GLUE_EXPORT ResourceLoaderBridge();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ResourceLoaderBridge);
-};
-
-}  // namespace webkit_glue
-
-#endif  // WEBKIT_GLUE_RESOURCE_LOADER_BRIDGE_H_