Expose GPU information to Telemetry.

tools/telemetry/telemetry/core/gpu_info.py

Index: tools/telemetry/telemetry/core/gpu_info.py
diff --git a/tools/telemetry/telemetry/core/gpu_info.py b/tools/telemetry/telemetry/core/gpu_info.py
new file mode 100644
index 0000000000000000000000000000000000000000..38fdb842ee3b0c22d6b016ed8a206f1b36505670
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+++ b/tools/telemetry/telemetry/core/gpu_info.py
@@ -0,0 +1,58 @@
+# 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.
+from telemetry.core import gpu_device
+
+class GPUInfo(object):
+  """Provides information about the GPUs on the system.
+
+     This class guarantees the following properties to be available:
+
+       gpus (array of type GPUDevice): the GPUs on the system. Element
+         0 is the primary GPU.
+
+       Consult the documentation for the individual properties for
+       more details."""
+
+  def __init__(self, gpus_array, aux_attributes):
+    if gpus_array == None:
+      raise Exception("Missing required 'gpus' property")
+    if len(gpus_array) == 0:
+      raise Exception("Missing at least one GPU in gpus_array")
+
+    self._gpus = [gpu_device.GPUDevice.FromDict(d) for d in gpus_array]
+    self._aux_attributes = aux_attributes
+
+  @classmethod
+  def FromDict(cls, attrs):
+    """Constructs a GPUInfo from a dictionary of attributes.
+       Attributes currently required to be present in the dictionary:
+
+         gpus (array of dictionaries, each of which contains
+             GPUDevice's required attributes)
+    """
+    return cls(attrs["gpus"], attrs.get("aux_attributes"))
+
+  @property
+  def gpus(self):
+    "An array of GPUDevices. Element 0 is the primary GPU on the system."
+    return self._gpus
+
+  @property
+  def aux_attributes(self):
+    """Returns a dictionary of auxiliary, optional, attributes. On the
+       Chrome browser, for example, this dictionary contains:
+
+         optimus (boolean)
+         amd_switchable (boolean)
+         lenovo_dcute (boolean)
+         driver_vendor (string)
+         driver_version (string)
+         driver_date (string)
+         gl_version_string (string)
+         gl_vendor (string)
+         gl_renderer (string)
+         gl_extensions (string)
+         display_link_version (string)
+    """
+    return self._aux_attributes