gpu testing: Handle non-integral device pixel ratio.

content/test/gpu/gpu_tests/cloud_storage_test_base.py

Index: content/test/gpu/gpu_tests/cloud_storage_test_base.py
diff --git a/content/test/gpu/gpu_tests/cloud_storage_test_base.py b/content/test/gpu/gpu_tests/cloud_storage_test_base.py
index f6e5234e6d5614392d5b0fba15a9452dd47feb8b..98969301bd8cb6fed7cc40654bf71fdd84f74b7d 100644
--- a/content/test/gpu/gpu_tests/cloud_storage_test_base.py
+++ b/content/test/gpu/gpu_tests/cloud_storage_test_base.py
@@ -24,8 +24,8 @@ error_image_cloud_storage_bucket = 'chromium-browser-gpu-tests'
 def _CompareScreenshotSamples(screenshot, expectations, device_pixel_ratio):
   for expectation in expectations:
     location = expectation["location"]
-    x = location[0] * device_pixel_ratio
-    y = location[1] * device_pixel_ratio
+    x = int(location[0] * device_pixel_ratio)
+    y = int(location[1] * device_pixel_ratio)
 
     if x < 0 or y < 0 or x > screenshot.width or y > screenshot.height:
       raise page_test.Failure(