From 6aec09b8ad4dd6dcd11babae85322d5208a464c6 Mon Sep 17 00:00:00 2001
From: "owenlin@chromium.org"
 <owenlin@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Fri, 28 Jun 2013 17:46:33 +0000
Subject: Returns empty dict for GetIOStats on CrOS platforms.

BUG=252912
TEST=Manully test the code on link
NOTRY=True

Review URL: https://chromiumcodereview.appspot.com/17591003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@209177 0039d316-1c4b-4281-b951-d872f2087c98
---
 .../docs/telemetry.core.platform.cros_platform_backend.html          | 4 ++--
 tools/telemetry/telemetry/core/platform/cros_platform_backend.py     | 5 +++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/telemetry/docs/telemetry.core.platform.cros_platform_backend.html b/tools/telemetry/docs/telemetry.core.platform.cros_platform_backend.html
index 91f060c..9733dd8 100644
--- a/tools/telemetry/docs/telemetry.core.platform.cros_platform_backend.html
+++ b/tools/telemetry/docs/telemetry.core.platform.cros_platform_backend.html
@@ -51,6 +51,8 @@
 </dl>
 <hr>
 Methods defined here:<br>
+<dl><dt><a name="CrosPlatformBackend-GetIOStats"><strong>GetIOStats</strong></a>(self, pid)</dt></dl>
+
 <dl><dt><a name="CrosPlatformBackend-GetOSName"><strong>GetOSName</strong></a>(self)</dt></dl>
 
 <dl><dt><a name="CrosPlatformBackend-GetRawDisplayFrameRateMeasurements"><strong>GetRawDisplayFrameRateMeasurements</strong></a>(self)</dt></dl>
@@ -67,8 +69,6 @@ Methods defined here:<br>
 
 <hr>
 Methods inherited from <a href="telemetry.core.platform.linux_platform_backend.html#LinuxPlatformBackend">telemetry.core.platform.linux_platform_backend.LinuxPlatformBackend</a>:<br>
-<dl><dt><a name="CrosPlatformBackend-GetIOStats"><strong>GetIOStats</strong></a>(self, pid)</dt></dl>
-
 <dl><dt><a name="CrosPlatformBackend-GetMemoryStats"><strong>GetMemoryStats</strong></a>(self, pid)</dt></dl>
 
 <dl><dt><a name="CrosPlatformBackend-GetSystemCommitCharge"><strong>GetSystemCommitCharge</strong></a>(self)</dt></dl>
diff --git a/tools/telemetry/telemetry/core/platform/cros_platform_backend.py b/tools/telemetry/telemetry/core/platform/cros_platform_backend.py
index 1475172..68ecc34 100644
--- a/tools/telemetry/telemetry/core/platform/cros_platform_backend.py
+++ b/tools/telemetry/telemetry/core/platform/cros_platform_backend.py
@@ -35,5 +35,10 @@ class CrosPlatformBackend(linux_platform_backend.LinuxPlatformBackend):
     except AssertionError:
       return ''
 
+  def GetIOStats(self, pid):
+    # There is no '/proc/<pid>/io' file on CrOS platforms
+    # Returns empty dict as it does in PlatformBackend.
+    return {}
+
   def GetOSName(self):
     return 'chromeos'
-- 
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