Force GPU switch with CGLSetVirtualScreen only for compositor

content/browser/gpu/gpu_driver_bug_list.json

 // Determines whether a certain driver bug exists in the current system.
 // A valid gpu_driver_bug_list.json file are in the format of
 // {
 //   "version": "x.y",
 //   "entries": [
 //     { // entry 1
 //     },
 //     ...
 //     { // entry n
 //     }
@@ skipping 40 matching lines @@
 //         "max_cube_map_texture_size_limit_1024",
 //         "max_cube_map_texture_size_limit_4096",
 //         "max_cube_map_texture_size_limit_512",
 //         "max_texture_size_limit_4096",
 //         "needs_glsl_built_in_function_emulation",
 //         "needs_offscreen_buffer_workaround",
 //         "restore_scissor_on_fbo_change",
 //         "reverse_point_sprite_coord_origin",
 //         "set_texture_filter_before_generating_mipmap",
 //         "use_client_side_arrays_for_stream_buffers",
 //         "use_current_program_after_successful_link".

[jbauman, 2013/04/06 01:52:02]

Add the new value to this list.

[ccameron, 2013/04/08 17:25:14]

Done.

 //     This field is mandatory.
 // 20. "description" has the description of the entry.
 // 21. "webkit_bugs" is an array of associated webkit bug numbers.
 // 22. "cr_bugs" is an array of associated chromium bug numbers.
 // 23. "browser_version" is a VERSION structure (defined below).  If this
 //     condition is not satisfied, the entry will be ignored.  If it is not
 //     present, then the entry applies to all versions of the browser.
 // 24. "disabled" is a boolean. If it is present, the entry will be skipped.
 //     This can not be used in exceptions.
 //
@@ skipping 12 matching lines @@
 //
 // FLOAT includes "op" "value", and "value2".  "op" can be any of the
 // following values: "=", "<", "<=", ">", ">=", "any", "between".  "value2" is
 // only used if "op" is "between".  "value" is used for all "op" values except
 // "any". "value" and "value2" are valid float numbers.
 // INT is very much like FLOAT, except that the values need to be integers.
 
 {
   "name": "gpu driver bug list",
   // Please update the version number whenever you change this file.
   "version": "1.1",

[jbauman, 2013/04/06 01:52:02]

Update the version number?

[ccameron, 2013/04/08 17:25:14]

Done.

   "entries": [
     {
       "id": 1,
       "description": "Imagination driver doesn't like uploading lots of buffer data constantly",
       "os": {
         "type": "android"
       },
       "gl_vendor": {
         "op": "beginwith",
         "value": "Imagination"
@@ skipping 194 matching lines @@
       "os": {
         "type": "android"
       },
       "gl_vendor": {
         "op": "beginwith",
         "value": "Qualcomm"
       },
       "features": [
         "disable_depth_texture"
       ]
+    },
+    {
+      "id": 18,
+      "description": "Workaround for performance problem using CGLSetVirtualScreen",
+      "os": {
+        "type": "macosx"
+      },
+      "vendor_id": "0x10de",
+      "features": [
+        "force_cgl_set_virtual_screen"
+      ]
     }
   ]
 }