Skip WebGL texture-switch-performance on debug_x64 as well as debug.

Add a 'debug_x64' and 'release_x64' build type for the Windows bots.

BUG=735483

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I71adf860a39fb14600c044dca9aeb8bd3bfb33fd
Reviewed-on: https://chromium-review.googlesource.com/579574
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488302}

content/test/gpu/gpu_tests/test_expectations.py

@@ -31,7 +31,7 @@ OS_CONDITIONS = ['win', 'mac', 'linux', 'chromeos', 'android'] + \
 
 BROWSER_TYPE_CONDITIONS = [
     'android-webview-instrumentation', 'android-content-shell',
-    'android-chromium', 'debug', 'release']
+    'android-chromium', 'debug', 'debug_x64', 'release', 'release_x64']
 
 ASAN_CONDITIONS = ['asan', 'no_asan']
 
@@ -91,7 +91,7 @@ class Expectation(object):
 
     Browser types:
       android-webview-instrumentation, android-content-shell,
-      android-chromium, debug, release
+      android-chromium, debug, debug_x64, release, release_x64
 
     Sample usage in SetExpectations in subclasses:
       self.Fail('gl-enable-vertex-attrib.html',

content/test/gpu/gpu_tests/webgl_conformance_expectations.py

@@ -113,7 +113,7 @@ class WebGLConformanceExpectations(GpuTestExpectations):
 
     # Don't run performance tests on debug builds
     self.Skip('conformance/rendering/texture-switch-performance.html',
-        ['debug'])
+        ['debug', 'debug_x64'], bug=735483)
 
     # Passthrough command decoder
     self.Fail('conformance/extensions/webgl-draw-buffers.html',