Fixes passing tests to test runner.
Fixes passing tests to test runner.

The suites are loaded by the framework, not the testrunner now. We only pass
the tests. Fixup the signature to correctly provide the tests.

BUG=trace-viewer:348
TBR=vmpstr@chromium.org

Review URL: https://codereview.appspot.com/12011048
SummerLW/Perf-Insight-Report,catapult-project/catapult,catapult-project/catapult,danbeam/catapult,danbeam/catapult,catapult-project/catapult-csm,dstockwell/catapult,vmpstr/trace-viewer,SummerLW/Perf-Insight-Report,modulexcite/catapult,modulexcite/catapult,benschmaus/catapult,benschmaus/catapult,danbeam/catapult,SummerLW/Perf-Insight-Report,catapult-project/catapult-csm,scottmcmaster/catapult,sahiljain/catapult,benschmaus/catapult,dstockwell/catapult,benschmaus/catapult,benschmaus/catapult,benschmaus/catapult,catapult-project/catapult,sahiljain/catapult,danbeam/catapult,vmpstr/trace-viewer,zeptonaut/catapult,SummerLW/Perf-Insight-Report,catapult-project/catapult-csm,sahiljain/catapult,dstockwell/catapult,scottmcmaster/catapult,scottmcmaster/catapult,catapult-project/catapult,vmpstr/trace-viewer,dstockwell/catapult,0x90sled/catapult,catapult-project/catapult,0x90sled/catapult,sahiljain/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,catapult-project/catapult,zeptonaut/catapult,catapult-project/catapult-csm,sahiljain/catapult,zeptonaut/catapult,SummerLW/Perf-Insight-Report,0x90sled/catapult,sahiljain/catapult,benschmaus/catapult,SummerLW/Perf-Insight-Report,catapult-project/catapult-csm,modulexcite/catapult,catapult-project/catapult