Expose GPU information to Telemetry.

tools/telemetry/telemetry/core/gpu_device.py

Index: tools/telemetry/telemetry/core/gpu_device.py
diff --git a/tools/telemetry/telemetry/core/gpu_device.py b/tools/telemetry/telemetry/core/gpu_device.py
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+++ b/tools/telemetry/telemetry/core/gpu_device.py
@@ -0,0 +1,71 @@
+# Copyright (c) 2013 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+class GPUDevice(object):
+  """Provides information about an individual GPU device.
+
+     On platforms which support them, the vendor_id and device_id are
+     PCI IDs. On other platforms, the vendor_string and device_string
+     are platform-dependent strings.
+  """
+
+  def __init__(self, vendor_id, device_id, vendor_string, device_string):
+    self._vendor_id = vendor_id
+    self._device_id = device_id
+    self._vendor_string = vendor_string
+    self._device_string = device_string
+
+  @classmethod
+  def FromDict(cls, attrs):
+    """Constructs a GPUDevice from a dictionary. Requires the
+       following attributes to be present in the dictionary:
+
+         vendor_id
+         device_id
+         vendor_string
+         device_string
+
+       Raises an exception if any attributes are missing.
+    """
+    required_attributes = ['vendor_id', 'device_id',
+                           'vendor_string', 'device_string']
+    for a in required_attributes:
+      if not a in attrs:
+        raise Exception('Missing required attribute "%s" in dictionary' % a)
+    return cls(attrs['vendor_id'], attrs['device_id'],
+               attrs['vendor_string'], attrs['device_string'])
+
+  @property
+  def vendor_id(self):
+    """The GPU vendor's PCI ID as a number, or 0 if not available.
+
+       Most desktop machines supply this information rather than the
+       vendor and device strings."""
+    return self._vendor_id
+
+  @property
+  def device_id(self):
+    """The GPU device's PCI ID as a number, or 0 if not available.
+
+       Most desktop machines supply this information rather than the
+       vendor and device strings."""
+    return self._device_id
+
+  @property
+  def vendor_string(self):
+    """The GPU vendor's name as a string, or the empty string if not
+       available.
+
+       Most mobile devices supply this information rather than the PCI
+       IDs."""
+    return self._vendor_string
+
+  @property
+  def device_string(self):
+    """The GPU device's name as a string, or the empty string if not
+       available.
+
+       Most mobile devices supply this information rather than the PCI
+       IDs."""
+    return self._device_string