Remove unused ScreenOrientation IPC message.

Also moves an IPC_ENUM_TRAITS definition to where it's actually used
now: it just happened to work before, since the IPC message generation
headers happen to #include things in mostly alphabetical order.

BUG=none

Review URL: https://codereview.chromium.org/1131263007

Cr-Commit-Position: refs/heads/master@{#329182}

content/common/screen_orientation_messages.h

@@ -9,16 +9,12 @@
 #include "ipc/ipc_message_macros.h"
 #include "third_party/WebKit/public/platform/WebLockOrientationError.h"
 #include "third_party/WebKit/public/platform/WebScreenOrientationLockType.h"
-#include "third_party/WebKit/public/platform/WebScreenOrientationType.h"
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
 #define IPC_MESSAGE_START ScreenOrientationMsgStart
 
-IPC_ENUM_TRAITS_MIN_MAX_VALUE(blink::WebScreenOrientationType,
-                              blink::WebScreenOrientationUndefined,
-                              blink::WebScreenOrientationLandscapeSecondary)
 IPC_ENUM_TRAITS_MIN_MAX_VALUE(blink::WebScreenOrientationLockType,
                               blink::WebScreenOrientationLockDefault,
                               blink::WebScreenOrientationLockNatural)
@@ -27,12 +23,6 @@ IPC_ENUM_TRAITS_MIN_MAX_VALUE(
       blink::WebLockOrientationErrorNotAvailable,
       blink::WebLockOrientationErrorCanceled)
 
-// The browser process informs the renderer process that the screen orientation
-// has changed. |orientation| contains the new screen orientation in degrees.
-// TODO(mlamouri): we could probably get rid of it.
-IPC_MESSAGE_CONTROL1(ScreenOrientationMsg_OrientationChange,
-                     blink::WebScreenOrientationType /* orientation */ )
-
 // The browser process' response to a ScreenOrientationHostMsg_LockRequest when
 // the lock actually succeeded. The |request_id| passed when receiving the
 // request is passed back so the renderer process can associate the response to

content/common/view_messages.h

@@ -42,6 +42,7 @@
 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
 #include "third_party/WebKit/public/platform/WebFloatRect.h"
 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
+#include "third_party/WebKit/public/platform/WebScreenOrientationType.h"
 #include "third_party/WebKit/public/web/WebDeviceEmulationParams.h"
 #include "third_party/WebKit/public/web/WebFindOptions.h"
 #include "third_party/WebKit/public/web/WebMediaPlayerAction.h"
@@ -82,6 +83,10 @@ IPC_ENUM_TRAITS_MAX_VALUE(blink::WebPluginAction::Type,
                           blink::WebPluginAction::Type::TypeLast)
 IPC_ENUM_TRAITS_MAX_VALUE(blink::WebPopupType,
                           blink::WebPopupType::WebPopupTypeLast)
+// TODO(dcheng): Update WebScreenOrientationType to have a "Last" enum member.
+IPC_ENUM_TRAITS_MIN_MAX_VALUE(blink::WebScreenOrientationType,
+                              blink::WebScreenOrientationUndefined,
+                              blink::WebScreenOrientationLandscapeSecondary)
 IPC_ENUM_TRAITS_MAX_VALUE(blink::WebTextDirection,
                           blink::WebTextDirection::WebTextDirectionLast)
 IPC_ENUM_TRAITS_MAX_VALUE(blink::WebDisplayMode,