graphics_WebGLPerformance: reduce timeout.

It was requested to reduce back to 30 minutes.

TEST=None.
BUG=chromium:551042

Change-Id: I7d259a172b939742d51274348bd1d30b4be8c843
Reviewed-on: https://chromium-review.googlesource.com/312698
Reviewed-by: Ilja Friedel <ihf@chromium.org>
Tested-by: Ilja Friedel <ihf@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/312834
diff --git a/client/site_tests/graphics_WebGLPerformance/graphics_WebGLPerformance.py b/client/site_tests/graphics_WebGLPerformance/graphics_WebGLPerformance.py
index c30be20..5550b6e 100644
--- a/client/site_tests/graphics_WebGLPerformance/graphics_WebGLPerformance.py
+++ b/client/site_tests/graphics_WebGLPerformance/graphics_WebGLPerformance.py
@@ -118,10 +118,6 @@
         @param test_duration_secs: The test duration in seconds.
         @param fullscreen: Whether to run the test in fullscreen.
         """
-        # TODO(ihf): Remove the timeout increase once crbug.com/551042 is fixed.
-        gpu_type = utils.get_gpu_family()
-        if gpu_type == 'pinetrail' or gpu_type == 'mali':
-            test_duration_secs = 7200
         self._test_duration_secs = test_duration_secs
 
         ext_paths = []