[Android] Enable platform mode on more perf bots.

scripts/slave/recipes/android/perf.py

Index: scripts/slave/recipes/android/perf.py
diff --git a/scripts/slave/recipes/android/perf.py b/scripts/slave/recipes/android/perf.py
index 6247a87f31bb11dbc82fb9245ebfa4a4421bca07..dea7b3ab4836d7cdd9c57cbc175b8af04f0041a7 100644
--- a/scripts/slave/recipes/android/perf.py
+++ b/scripts/slave/recipes/android/perf.py
@@ -70,16 +70,16 @@ def _ChromiumPerfTesters():
         num_host_shards=3, target_bits=32, enable_platform_mode=True),
     _CreateTestSpec('Android Nexus5 Perf', 'android-nexus5',
         required_apks=['ChromePublic.apk'], num_device_shards=7,
-        num_host_shards=3, target_bits=32),
+        num_host_shards=3, target_bits=32, enable_platform_mode=True),
     _CreateTestSpec('Android Nexus5X Perf', 'android-nexus5X',
         required_apks=['ChromePublic.apk'], num_device_shards=7,
-        num_host_shards=3),
+        num_host_shards=3, enable_platform_mode=True),
     _CreateTestSpec('Android Nexus6 Perf', 'android-nexus6',
         required_apks=['ChromePublic.apk'], num_device_shards=7,
         num_host_shards=3, target_bits=32),
     _CreateTestSpec('Android Nexus7v2 Perf', 'android-nexus7v2',
         required_apks=['ChromePublic.apk'], num_device_shards=7,
-        num_host_shards=3, target_bits=32),
+        num_host_shards=3, target_bits=32, enable_platform_mode=True),
     _CreateTestSpec('Android Nexus9 Perf', 'android-nexus9',
         required_apks=['ChromePublic.apk'], num_device_shards=7,
         num_host_shards=3),