cc: zero/one-copy based on shared memory on IOS uses GL_TEXTURE_2D, not GL_TEXTURE_RECTANGLE_ARB.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 0c75bb8ac0d7b0650f94d7fd9b8171414cbf6515..e5ed627db5222b2e1fa2f68ad9f44b70e064672c 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -1037,8 +1037,9 @@ static void AppendCompositorCommandLineFlags(base::CommandLine* command_line) {
     // The GPU service will always use the preferred type.
     gfx::GpuMemoryBufferType type = supported_types[0];
 
-    // Surface texture backed GPU memory buffers require TEXTURE_EXTERNAL_OES.
-    if (type == gfx::SURFACE_TEXTURE_BUFFER)
+    // Surface texture backed GPU memory buffers require TEXTURE_EXTERNAL_OES
+    // or GL_TEXTURE_RECTANGLE_ARB.

[reveman, 2014/12/01 17:03:14]

This comment is now incorrect and telling the renderer to use ImageExternal for
IO surfaces is incorrect. IO surfaces require TEXTURE_RECTANGLE_ARB.

+    if (type == gfx::SURFACE_TEXTURE_BUFFER || type == gfx::IO_SURFACE_BUFFER)
       command_line->AppendSwitch(switches::kUseImageExternal);
   }