If user had consented for metrics reporting, send speech input request origin to the server.

chrome/common/speech_input_messages.h

+// Copyright (c) 2011 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 CHROME_COMMON_SPEECH_INPUT_MESSAGES_H_
+#define CHROME_COMMON_SPEECH_INPUT_MESSAGES_H_
+#pragma once
+
+#include "chrome/common/speech_input_result.h"
+#include "gfx/rect.h"
+#include "ipc/ipc_message_macros.h"
+#include "ipc/ipc_param_traits.h"
+
+#define IPC_MESSAGE_START SpeechInputMsgStart
+
+namespace speech_input {
+struct SpeechInputResultItem;
+}
+
+// Used to start a speech recognition session.
+struct SpeechInputHostMsg_StartRecognition_Params {
+  SpeechInputHostMsg_StartRecognition_Params();
+  ~SpeechInputHostMsg_StartRecognition_Params();
+
+  int render_view_id;  // The render view requesting speech recognition.
+  int request_id;  // Request ID used within the render view.
+  gfx::Rect element_rect;  // Position of the UI element in page coordinates.
+  std::string language;  // Language to use for speech recognition.
+  std::string grammar;  // Speech grammar given by the speech input element.
+  std::string origin_url;  // URL of the page (or iframe if applicable).
+};
+
+namespace IPC {
+
+template <>
+struct ParamTraits<speech_input::SpeechInputResultItem> {
+  typedef speech_input::SpeechInputResultItem param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<SpeechInputHostMsg_StartRecognition_Params> {
+  typedef SpeechInputHostMsg_StartRecognition_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+}  // namespace IPC
+
+// Speech input messages sent from the renderer to the browser.
+
+// Requests the speech input service to start speech recognition on behalf of
+// the given |render_view_id|.
+IPC_MESSAGE_CONTROL1(SpeechInputHostMsg_StartRecognition,
+                     SpeechInputHostMsg_StartRecognition_Params)
+
+// Requests the speech input service to cancel speech recognition on behalf of
+// the given |render_view_id|. If speech recognition is not happening nor or
+// is happening on behalf of some other render view, this call does nothing.
+IPC_MESSAGE_CONTROL2(SpeechInputHostMsg_CancelRecognition,
+                     int /* render_view_id */,
+                     int /* request id */)

[jam, 2011/01/19 20:29:23]

nit: the usual style for parameter names inside the comments is to name it just
like the dispatcher function names is parameters.  this is useful in case in the
future we change how IPC messages are declared (i.e. IDLs) and we want to use a
script to generate the IDLs.

[Satish, 2011/01/20 11:04:12]

Changed to 'request_id' in all these declarations

+
+// Requests the speech input service to stop audio recording on behalf of
+// the given |render_view_id|. Any audio recorded so far will be fed to the
+// speech recognizer. If speech recognition is not happening nor or is

[hans, 2011/01/20 09:29:29]

"nor or" ?

[Satish, 2011/01/20 11:04:12]

Removed 'nor'

+// happening on behalf of some other render view, this call does nothing.
+IPC_MESSAGE_CONTROL2(SpeechInputHostMsg_StopRecording,
+                     int /* render_view_id */,
+                     int /* request id */)
+
+// Speech input messages sent from the browser to the renderer.
+
+// Relay a speech recognition result, either partial or final.
+IPC_MESSAGE_ROUTED2(SpeechInputMsg_SetRecognitionResult,
+                    int /* request id */,
+                    speech_input::SpeechInputResultArray /* result */)
+
+// Indicate that speech recognizer has stopped recording and started
+// recognition.
+IPC_MESSAGE_ROUTED1(SpeechInputMsg_RecordingComplete,
+                    int /* request id */)
+
+// Indicate that speech recognizer has completed recognition. This will be
+// the last message sent in response to a
+// ViewHostMsg_SpeechInput_StartRecognition.
+IPC_MESSAGE_ROUTED1(SpeechInputMsg_RecognitionComplete,
+                    int /* request id */)
+
+#endif  // CHROME_COMMON_SPEECH_INPUT_MESSAGES_H_