[DevTools] Handle emulation in embedder, call into web API.

content/common/devtools_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.
 
 // Developer tools consist of the following parts:
 //
 // DevToolsAgent lives in the renderer of an inspected page and provides access
 // to the pages resources, DOM, v8 etc. by means of IPC messages.
 //
 // DevToolsClient is a thin delegate that lives in the tools front-end
@@ skipping 28 matching lines @@
 // This file describes developer tools message types.
 
 // Multiply-included message file, no standard include guard.
 #include <map>
 #include <string>
 
 #include "content/common/content_export.h"
 #include "content/public/common/common_param_traits.h"
 #include "content/public/common/console_message_level.h"
 #include "ipc/ipc_message_macros.h"
+#include "third_party/WebKit/public/web/WebDeviceEmulationParams.h"
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
 #define IPC_MESSAGE_START DevToolsMsgStart
 
+IPC_ENUM_TRAITS_MAX_VALUE(blink::WebDeviceEmulationParams::ScreenPosition,
+                          blink::WebDeviceEmulationParams::ScreenPositionLast)
+
+IPC_STRUCT_TRAITS_BEGIN(blink::WebSize)
+  IPC_STRUCT_TRAITS_MEMBER(width)
+  IPC_STRUCT_TRAITS_MEMBER(height)
+IPC_STRUCT_TRAITS_END()
+
+IPC_STRUCT_TRAITS_BEGIN(blink::WebDeviceEmulationParams)
+  IPC_STRUCT_TRAITS_MEMBER(screenPosition)
+  IPC_STRUCT_TRAITS_MEMBER(deviceScaleFactor)
+  IPC_STRUCT_TRAITS_MEMBER(viewSize)
+  IPC_STRUCT_TRAITS_MEMBER(fitToView)
+  IPC_STRUCT_TRAITS_MEMBER(offset)
+  IPC_STRUCT_TRAITS_MEMBER(scale)
+IPC_STRUCT_TRAITS_END()
+
 // These are messages sent from DevToolsAgent to DevToolsClient through the
 // browser.
 
 // Agent -> Client message chunk.
 //   |is_first| marks the first chunk, comes with the |message_size| for
 //   total message size.
 //   |is_last| marks the last chunk. |call_id| and |post_state| are optional
 //    parameters passed with the last chunk of the protocol response.
 IPC_STRUCT_BEGIN(DevToolsMessageChunk)
   IPC_STRUCT_MEMBER(bool, is_first)
@@ skipping 42 matching lines @@
 //-----------------------------------------------------------------------------
 // These are messages sent from the browser to the renderer.
 
 // RenderViewHostDelegate::RenderViewCreated method sends this message to a
 // new renderer to notify it that it will host developer tools UI and should
 // set up all neccessary bindings and create DevToolsClient instance that
 // will handle communication with inspected page DevToolsAgent.
 IPC_MESSAGE_ROUTED0(DevToolsMsg_SetupDevToolsClient)
 
 
+// Enables device emulation.
+IPC_MESSAGE_ROUTED1(DevToolsMsg_EnableDeviceEmulation,
+                    blink::WebDeviceEmulationParams /* params */)
+
+// Disables device emulation, enabled previously by EnableDeviceEmulation.
+IPC_MESSAGE_ROUTED0(DevToolsMsg_DisableDeviceEmulation)
+
 //-----------------------------------------------------------------------------
 // These are messages sent from the renderer to the browser.
 
 // Transport from Inspector frontend to frontend host.
 IPC_MESSAGE_ROUTED1(DevToolsHostMsg_DispatchOnEmbedder,
                     std::string /* message */)