Delete the browser-compositor webview render mode

android_webview/common/render_view_messages.h

Index: android_webview/common/render_view_messages.h
diff --git a/android_webview/common/render_view_messages.h b/android_webview/common/render_view_messages.h
index 96e8c00b4d1fef3ea1db7a9e61dc9f49a8cc3efb..68ce3bc2524b1110dcac2743934f46e1eb029ad6 100644
--- a/android_webview/common/render_view_messages.h
+++ b/android_webview/common/render_view_messages.h
@@ -51,14 +51,6 @@ IPC_MESSAGE_ROUTED2(AwViewMsg_DoHitTest,
                     int /* view_x */,
                     int /* view_y */)
 
-// Enables receiving pictures from the renderer on every new frame.
-IPC_MESSAGE_ROUTED1(AwViewMsg_EnableCapturePictureCallback,
-                    bool /* enable */)
-
-// Requests a new picture with the latest renderer contents synchronously.
-// This message blocks the browser process on the renderer until complete.
-IPC_SYNC_MESSAGE_ROUTED0_0(AwViewMsg_CapturePictureSync)
-
 // Sets the zoom level for text only. Used in layout modes other than
 // Text Autosizing.
 IPC_MESSAGE_ROUTED1(AwViewMsg_SetTextZoomLevel,
@@ -91,7 +83,3 @@ IPC_MESSAGE_ROUTED1(AwViewHostMsg_UpdateHitTestData,
 IPC_MESSAGE_ROUTED1(AwViewHostMsg_PageScaleFactorChanged,
                     float /* page_scale_factor */)
 
-// Notification that a new picture becomes available. It is only sent if
-// AwViewMsg_EnableCapturePictureCallback was previously enabled.
-IPC_MESSAGE_ROUTED0(AwViewHostMsg_PictureUpdated)
-