Move gpu blacklist to content side.

chrome/browser/chrome_gpu_util.cc

+// Copyright (c) 2012 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.
+
+#include "chrome/browser/chrome_gpu_util.h"
+
+#include "base/command_line.h"
+#include "base/metrics/field_trial.h"
+#include "base/metrics/histogram.h"
+#include "base/version.h"
+#if defined(OS_WIN)
+#include "base/win/windows_version.h"
+#endif
+#include "chrome/common/chrome_version_info.h"
+#include "content/public/browser/gpu_data_manager.h"
+#include "content/public/common/content_constants.h"
+#include "content/public/common/content_switches.h"
+
+using content::GpuDataManager;
+
+namespace gpu_util {
+
+void InitializeCompositingFieldTrial() {
+// Enable the field trial only on desktop OS's.
+#if !(defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX))
+  return;
+#endif
+#if defined(OS_WIN)
+  // Don't run the trial on Windows XP.
+  if (base::win::GetVersion() < base::win::VERSION_VISTA)
+    return;
+#endif
+
+  // The performance of accelerated compositing is too low with software
+  // rendering.
+  if (content::GpuDataManager::GetInstance()->ShouldUseSoftwareRendering())
+    return;
+
+  // Don't activate the field trial if force-compositing-mode has been
+  // explicitly disabled from the command line.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableForceCompositingMode))
+    return;
+
+  const base::FieldTrial::Probability kDivisor = 3;
+  scoped_refptr<base::FieldTrial> trial(
+    base::FieldTrialList::FactoryGetFieldTrial(
+        content::kGpuCompositingFieldTrialName, kDivisor,
+        "disable", 2012, 12, 31, NULL));
+
+  // Produce the same result on every run of this client.
+  trial->UseOneTimeRandomization();
+
+  base::FieldTrial::Probability force_compositing_mode_probability = 0;
+  base::FieldTrial::Probability threaded_compositing_probability = 0;
+
+  chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
+  if (channel == chrome::VersionInfo::CHANNEL_STABLE ||
+      channel == chrome::VersionInfo::CHANNEL_BETA) {
+    // Stable and Beta channels: Non-threaded force-compositing-mode on by
+    // default (mac and windows only).
+#if defined(OS_WIN) || defined(OS_MACOSX)
+    force_compositing_mode_probability = 3;
+#endif
+  } else if (channel == chrome::VersionInfo::CHANNEL_DEV ||
+             channel == chrome::VersionInfo::CHANNEL_CANARY) {
+    // Dev and Canary channels: force-compositing-mode and
+    // threaded-compositing on with 1/3 probability each.
+    force_compositing_mode_probability = 1;
+
+#if defined(OS_MACOSX) || defined(OS_LINUX)
+    // Threaded compositing mode isn't feature complete on mac or linux yet:
+    // http://crbug.com/133602 for mac
+    // http://crbug.com/140866 for linux
+    threaded_compositing_probability = 0;
+#else
+    if (!CommandLine::ForCurrentProcess()->HasSwitch(
+            switches::kDisableThreadedCompositing))
+        threaded_compositing_probability = 1;
+#endif
+  }
+
+
+  int force_compositing_group = trial->AppendGroup(
+      content::kGpuCompositingFieldTrialForceCompositingEnabledName,
+      force_compositing_mode_probability);
+  int thread_group = trial->AppendGroup(
+      content::kGpuCompositingFieldTrialThreadEnabledName,
+      threaded_compositing_probability);
+
+  bool force_compositing = (trial->group() == force_compositing_group);
+  bool thread = (trial->group() == thread_group);
+  UMA_HISTOGRAM_BOOLEAN("GPU.InForceCompositingModeFieldTrial",
+                        force_compositing);
+  UMA_HISTOGRAM_BOOLEAN("GPU.InCompositorThreadFieldTrial", thread);
+}
+
+}  // namespace gpu_util;
+