Implement WebPrescientNetworking to trigger preconnect from Blink

chrome/common/render_messages.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.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 14 matching lines @@
 #include "chrome/common/search_provider.h"
 #include "chrome/common/search_types.h"
 #include "chrome/common/translate_errors.h"
 #include "content/public/common/common_param_traits.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCache.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebConsoleMessage.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebPreconnectMotivation.h"
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/rect.h"
 
 // Singly-included section for enums and custom IPC traits.
 #ifndef CHROME_COMMON_RENDER_MESSAGES_H_
 #define CHROME_COMMON_RENDER_MESSAGES_H_
 
 class SkBitmap;
 
 // Command values for the cmd parameter of the
@@ skipping 74 matching lines @@
 IPC_ENUM_TRAITS(InstantCompleteBehavior)
 IPC_ENUM_TRAITS(InstantSizeUnits)
 IPC_ENUM_TRAITS(InstantSuggestionType)
 IPC_ENUM_TRAITS(OmniboxFocusState)
 IPC_ENUM_TRAITS(search_provider::OSDDType)
 IPC_ENUM_TRAITS(search_provider::InstallState)
 IPC_ENUM_TRAITS(ThemeBackgroundImageAlignment)
 IPC_ENUM_TRAITS(ThemeBackgroundImageTiling)
 IPC_ENUM_TRAITS(TranslateErrors::Type)
 IPC_ENUM_TRAITS(WebKit::WebConsoleMessage::Level)
+IPC_ENUM_TRAITS(WebKit::WebPreconnectMotivation)
 
 IPC_STRUCT_TRAITS_BEGIN(ChromeViewHostMsg_GetPluginInfo_Status)
 IPC_STRUCT_TRAITS_MEMBER(value)
 IPC_STRUCT_TRAITS_END()
 
 // Output parameters for ChromeViewHostMsg_GetPluginInfo message.
 IPC_STRUCT_BEGIN(ChromeViewHostMsg_GetPluginInfo_Output)
   IPC_STRUCT_MEMBER(ChromeViewHostMsg_GetPluginInfo_Status, status)
   IPC_STRUCT_MEMBER(webkit::WebPluginInfo, plugin)
   IPC_STRUCT_MEMBER(std::string, actual_mime_type)
@@ skipping 476 matching lines @@
 // Sends back stats about the V8 heap.
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_V8HeapStats,
                      int /* size of heap (allocated from the OS) */,
                      int /* bytes in use */)
 
 // Request for a DNS prefetch of the names in the array.
 // NameList is typedef'ed std::vector<std::string>
 IPC_MESSAGE_CONTROL1(ChromeViewHostMsg_DnsPrefetch,
                      std::vector<std::string> /* hostnames */)
 
+// Request for preconnect to host providing resource specified by URL
+IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_Preconnect,
+                     GURL /* preconnect target url */,
+                     WebKit::WebPreconnectMotivation)
+
 // Notifies when a plugin couldn't be loaded because it's outdated.
 IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_BlockedOutdatedPlugin,
                     int /* placeholder ID */,
                     std::string /* plug-in group identifier */)
 
 // Notifies when a plugin couldn't be loaded because it requires
 // user authorization.
 IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_BlockedUnauthorizedPlugin,
                     string16 /* name */,
                     std::string /* plug-in group identifier */)
@@ skipping 104 matching lines @@
 // previous SetCookie message to be processed.
 IPC_SYNC_MESSAGE_ROUTED2_1(ChromeViewHostMsg_GetCookies,
                            GURL /* url */,
                            GURL /* first_party_for_cookies */,
                            std::string /* cookies */)
 
 // Provide the browser process with current renderer framerate.
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_FPS,
                      int /* routing id */,
                      float /* frames per second */)