No bug - Skip common intermittant test. - a=testonly

MozReview-Commit-ID: JpreGx7Wm9E

dom/canvas/test/webgl-conf/generated-mochitest.ini

@@ -5768,7 +5768,7 @@ skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.
 [generated/test_2_conformance__rendering__line-loop-tri-fan.html]
 skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
 [generated/test_2_conformance__rendering__many-draw-calls.html]
-skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
+skip-if = debug || (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
 [generated/test_2_conformance__rendering__more-than-65536-indices.html]
 skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
 [generated/test_2_conformance__rendering__multisample-corruption.html]

dom/canvas/test/webgl-conf/mochitest-errata.ini

@@ -301,6 +301,9 @@ skip-if = (os == 'android')
 # Crashes on Android
 # Times-out on DEBUG builds
 skip-if = (os == 'android') || debug
+[generated/test_2_conformance__rendering__many-draw-calls.html]
+# Appears to just take too long on debug, most of the time.
+skip-if = debug
 [generated/test_conformance__uniforms__out-of-bounds-uniform-array-access.html]
 # Crashes
 skip-if = (os == 'android') || (os == 'mac' && os_version == '10.6')