Minimal Chrome Frame with Aura.

chrome/common/automation_messages_internal.h

Index: chrome/common/automation_messages_internal.h
diff --git a/chrome/common/automation_messages_internal.h b/chrome/common/automation_messages_internal.h
index 00167ee71e81f07a3ce76953edaacd0c74eb7767..51ee9215f60af67d4d89a3995e18dd3f3e80c4f6 100644
--- a/chrome/common/automation_messages_internal.h
+++ b/chrome/common/automation_messages_internal.h
@@ -252,16 +252,18 @@ IPC_MESSAGE_CONTROL3(AutomationMsg_DEPRECATED_WindowKeyPress,
                      int,
                      int)
 
+#if defined(OS_WIN)
 // This message notifies the AutomationProvider to create a tab which is
 // hosted by an external process.
 // Request:
 //   ExternalTabSettings - settings for external tab
 IPC_SYNC_MESSAGE_CONTROL1_4(AutomationMsg_CreateExternalTab,

[kkania, 2013/02/26 16:36:28]

Unfortunately, you need to preserve the line numbers of these messages unless
you want to check in a new reference build for the performance tests that are
still based on the AutomationProxy framework.

[grt (UTC plus 2), 2013/02/26 16:55:45]

Is it okay to put the new preprocessor conditionals in the existing empty lines
between messages to preserve line numbering?

I noticed that a new message was inserted in r176470. I don't see a
corresponding commit to the reference builds. Is there a reason that an update
wasn't needed in that case?

                             ExternalTabSettings  /* settings*/,
-                            gfx::NativeWindow  /* Tab container window */,
-                            gfx::NativeWindow  /* Tab window */,
+                            HWND  /* Tab container window */,
+                            HWND  /* Tab window */,
                             int  /* Handle to the new tab */,
                             int  /* Session Id of the new tab */)
+#endif  // defined(OS_WIN)
 
 // This message notifies the AutomationProvider to navigate to a specified
 // url in the external tab with given handle. The first parameter is the
@@ -557,7 +559,7 @@ IPC_MESSAGE_ROUTED2(AutomationMsg_NavigationFailed,
                     int,
                     GURL)
 
-#if defined(OS_WIN) && !defined(USE_AURA)
+#if defined(OS_WIN)
 // This message is an outgoing message from an automation client to Chrome.
 // It is used to reposition a chrome tab window.
 IPC_MESSAGE_CONTROL2(AutomationMsg_TabReposition,
@@ -718,15 +720,17 @@ IPC_SYNC_MESSAGE_CONTROL2_1(
 IPC_MESSAGE_ROUTED1(AutomationMsg_AttachExternalTab,
                     AttachExternalTabParams)
 
+#if defined(OS_WIN)
 // Sent when the automation client connects to an existing tab.
 IPC_SYNC_MESSAGE_CONTROL3_4(AutomationMsg_ConnectExternalTab,
                             uint64 /* cookie */,
                             bool   /* allow/block tab*/,
-                            gfx::NativeWindow  /* parent window */,
-                            gfx::NativeWindow  /* Tab container window */,
-                            gfx::NativeWindow  /* Tab window */,
+                            HWND  /* parent window */,
+                            HWND  /* Tab container window */,
+                            HWND  /* Tab window */,
                             int  /* Handle to the new tab */,
                             int  /* Session Id of the new tab */)
+#endif  // defined(OS_WIN)
 
 // Simulate an end of session. Normally this happens when the user
 // shuts down the machine or logs off.