NOT for review (for discussion): Query IOSurfaceIsInUse in the browser process

gpu/GLES2/extensions/CHROMIUM/CHROMIUM_schedule_ca_layer.txt

Index: gpu/GLES2/extensions/CHROMIUM/CHROMIUM_schedule_ca_layer.txt
diff --git a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_schedule_ca_layer.txt b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_schedule_ca_layer.txt
index 5b87c930a7af16b7a21a4ac48d7c3aa67ba9fd76..3e2e7dd703548534a89d66bd050a0176952bdd8d 100644
--- a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_schedule_ca_layer.txt
+++ b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_schedule_ca_layer.txt
@@ -87,12 +87,20 @@ New Procedures and Functions
 
     The command
 
-       glScheduleCALayerInUseQueryCHROMIUM(GLsizei count, GLuint* textures);
-
-    schedules a query at the time of the next call to swap buffers. If the given
-    texture is backed by an IOSurface, then the query checks to see whether the
-    IOSurface is in use by the Window Server. Otherwise, the query returns
-    false. All the results will be returned with the swap ACK in
+       glScheduleCALayerInUseQueryCHROMIUM(
+           GLsizei count,
+           GLuint* textures_and_handle_requests);
+
+    schedules a query at the time of the next call to swap buffers. 
+    <textures_and_handle_requests> contains an array of <count> pairs of
+    integers. The first value in each pair is a texture handle. The second value
+    either GL_TRUE or GL_FALSE indicating a request for a GpuMemoryBuffer
+    handle.
+    If the specified texture is backed by an IOSurface and a
+    GpuMemoryBufferHanlde is requested, then the handle will be returned along
+    with a boolean value indicating if the value of IOSurfaceIsInUse is
+    meaningful or not for that IOSurface. All of the results, regardless of
+    GpuMemoryBufferHandle requests will be returned with the swap ACK in
     GpuCommandBufferMsg_SwapBuffersCompleted_Params. Clients should not destroy
     any textures while they are being queried, as the swap ACK will use the
     original texture id to identify the queried textures.
@@ -108,6 +116,7 @@ New State
 
 Revision History
 
+    11/3/2016    Add textures_and_handle_requests parameter.
     6/13/2016    Add glScheduleCALayerInUseQueryCHROMIUM.
     4/12/2016    Add a parameter to support minification and magnification
                  filtering.