Make gpu black list work again on Linux

content/test/gpu/gpu_tests/gpu_process.py

Index: content/test/gpu/gpu_tests/gpu_process.py
diff --git a/content/test/gpu/gpu_tests/gpu_process.py b/content/test/gpu/gpu_tests/gpu_process.py
index a27c701594c178945284891d18268a2c76b82880..5dfabdefa6d204cb1e05363e13cb36c28d60cb89 100644
--- a/content/test/gpu/gpu_tests/gpu_process.py
+++ b/content/test/gpu/gpu_tests/gpu_process.py
@@ -30,10 +30,10 @@ class GpuProcessValidator(gpu_test_base.ValidatorBase):
     if hasattr(page, 'Validate'):
       page.Validate(tab, results)
     else:
-      has_gpu_process_js = 'chrome.gpuBenchmarking.hasGpuProcess()'
-      has_gpu_process = tab.EvaluateJavaScript(has_gpu_process_js)
-      if not has_gpu_process:
-        raise page_test.Failure('No GPU process detected')
+      has_gpu_channel_js = 'chrome.gpuBenchmarking.hasGpuChannel()'
+      has_gpu_channel = tab.EvaluateJavaScript(has_gpu_channel_js)
+      if not has_gpu_channel:
+        raise page_test.Failure('No GPU channel detected')
 
 class GpuProcess(gpu_test_base.TestBase):
   """Tests that accelerated content triggers the creation of a GPU process"""