Break glScheduleCALayerCHROMIUM into smaller functions.

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 29606b230b07ff4cdcfd64cdd0824e274cf95ce0..d7a07ccfa171656af2daf8f952cdd13c7ed105b9 100644
--- a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_schedule_ca_layer.txt
+++ b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_schedule_ca_layer.txt
@@ -39,37 +39,56 @@ New Procedures and Functions
 
     The command
 
+        glScheduleCALayerSharedStateCHROMIUM(GLfloat opacity,
+                                             GLboolean is_clipped,
+                                             const GLfloat* clip_rect,
+                                             GLint sorting_context_id,
+                                             const GLfloat* transform);
+
+    sets state that will be shared by each subsequent call to
+    glScheduleCALayerCHROMIUM. A subsequent call to
+    glScheduleCALayerSharedStateCHROMIUM overrides the previous shared state
+    values.
+    <opacity> specifies the opacity of the CALayer.
+    <is_clipped> indicates if the layer should be clipped.
+    <clip_rect> contains four values indicating the x, y, width, and height of
+    the rectangle to clip the layer to, if it is to be clipped.
+    <sorting_context_id> Layers in a non-zero sorting context exist in the same
+    3D space and should intersect.
+    <transform> contains sixteen values indicating the row major order 4x4
+    transformation matrix to apply to the CALayer.
+
+    The command
+

[ccameron, 2016/07/19 20:29:51]

Let's just have SwapBuffers automatically clear the shared state, rather than
having an explicit "unschedule". We already latch everything at swap, so it's
pretty consistent.

[erikchen, 2016/07/19 20:42:26]

Done.

+       glUnscheduleCALayerSharedStateCHROMIUM();
+
+    unsets the state set by glScheduleCALayerSharedStateCHROMIUM. This command
+    is used to prevent shared state from leaking into inappropriate frames.
+
+    The command
+
         glScheduleCALayerCHROMIUM(GLuint contents_texture_id,
                                   const GLfloat* contents_rect,
-                                  GLfloat opacity,
                                   GLuint background_color,
                                   GLuint edge_aa_mask,
                                   const GLfloat* bounds_rect,
-                                  GLboolean is_clipped,
-                                  const GLfloat* clip_rect,
-                                  const GLfloat* transform,
                                   GLuint filter);
 
-    Set the CALayer parameters to be presented at the time of the next call to
-    swap buffers. The order of the calls schedule CALayers determines their
-    back-to-front presentation order.
+    requires that shared state has been previously set by
+    glScheduleCALayerSharedStateCHROMIUM. It sets the CALayer parameters to be
+    presented at the time of the next call to swap buffers. The order of the
+    calls schedule CALayers determines their back-to-front presentation order.
     <contents_texture_id> is the texture to be presented. If zero, then the
     CALayer will be a solid color.
     <contents_rect> contains four values indicating the x, y, width, and height
     of the sub-rectangle to display from the texture specified in
     <contents_texture_id>, in normalized coordinates.
-    <opacity> specifies the opacity of the CALayer.
     <background_color> specifies the background color of the CALayer, as a
     32-bit ARGB value.
     <edge_aa_mask> is a bitfield specifying which of the edges of the layer are
     to have anti-aliasing.
     <bounds_rect> contains four values indicating the x, y, width, and height of
     the layer in pixels.
-    <is_clipped> indicates if the layer should be clipped.
-    <clip_rect> contains four values indicating the x, y, width, and height of
-    the rectangle to clip the layer to, if it is to be clipped.
-    <transform> contains sixteen values indicating the row major order 4x4
-    transformation matrix to apply to the CALayer.
     <filter> will be used for both minification and magnification filtering. The
     only valid values are GL_LINEAR and GL_NEAREST.