Adds units for all Chromium perf tests. These units are recorded in the graphs.dat file, and can then be used to determine whether the test has improved or regressed when the graph goes up.

Review URL: https://chromiumcodereview.appspot.com/11234012

git-svn-id: http://src.chromium.org/svn/trunk/src/build@163638 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.croc

@@ -89,7 +89,7 @@
     },
     {
       'stat' : '100.0 * files_instrumented / files_executable',
-      'format' : '*RESULT FilesInstrumentedPercent: files_instrumented_percent= %g',
+      'format' : '*RESULT FilesInstrumentedPercent: files_instrumented_percent= %g percent',
     },
     {
       'stat' : 'lines_executable',
@@ -111,16 +111,16 @@
     },
     {
       'stat' : '100.0 * lines_covered / lines_executable',
-      'format' : '*RESULT PercentCovered: percent_covered= %g',
+      'format' : '*RESULT PercentCovered: percent_covered= %g percent',
     },
     {
       'stat' : '100.0 * lines_covered / lines_executable',
-      'format' : '*RESULT PercentCoveredSource: percent_covered_source= %g',
+      'format' : '*RESULT PercentCoveredSource: percent_covered_source= %g percent',
       'group' : 'source',
     },
     {
       'stat' : '100.0 * lines_covered / lines_executable',
-      'format' : '*RESULT PercentCoveredTest: percent_covered_test= %g',
+      'format' : '*RESULT PercentCoveredTest: percent_covered_test= %g percent',
       'group' : 'test',
     },
   ],