Refactor GpuDataManagerImpl to make it thread-safe.

content/browser/gpu/gpu_data_manager_impl_private.cc

+// 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.
+
+#include "content/browser/gpu/gpu_data_manager_impl_private.h"
+
+#if defined(OS_MACOSX)
+#include <ApplicationServices/ApplicationServices.h>
+#endif  // OS_MACOSX
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/command_line.h"
+#include "base/debug/trace_event.h"
+#include "base/metrics/field_trial.h"
+#include "base/metrics/histogram.h"
+#include "base/stringprintf.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_piece.h"
+#include "base/sys_info.h"
+#include "base/version.h"
+#include "content/browser/gpu/gpu_process_host.h"
+#include "content/browser/gpu/gpu_util.h"
+#include "content/common/gpu/gpu_messages.h"
+#include "content/gpu/gpu_info_collector.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/gpu_data_manager_observer.h"
+#include "content/public/common/content_client.h"
+#include "content/public/common/content_constants.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/common/gpu_feature_type.h"
+#include "gpu/command_buffer/service/gpu_switches.h"
+#include "grit/content_resources.h"
+#include "ui/base/ui_base_switches.h"
+#include "ui/gl/gl_implementation.h"
+#include "ui/gl/gl_switches.h"
+#include "ui/gl/gpu_switching_manager.h"
+#include "webkit/glue/webpreferences.h"
+#include "webkit/plugins/plugin_switches.h"
+
+#if defined(OS_WIN)
+#include "base/win/windows_version.h"
+#endif
+
+namespace content {
+namespace {
+
+// Strip out the non-digital info; if after that, we get an empty string,
+// return "0".
+std::string ProcessVersionString(const std::string& raw_string) {
+  const std::string valid_set = "0123456789.";
+  size_t start_pos = raw_string.find_first_of(valid_set);
+  if (start_pos == std::string::npos)
+    return "0";
+  size_t end_pos = raw_string.find_first_not_of(raw_string, start_pos);
+  std::string version_string = raw_string.substr(
+      start_pos, end_pos - start_pos);
+  if (version_string.empty())
+    return "0";
+  return version_string;
+}
+
+// Combine the integers into a string, seperated by ','.
+std::string IntSetToString(const std::set<int>& list) {
+  std::string rt;
+  for (std::set<int>::const_iterator it = list.begin();
+       it != list.end(); ++it) {
+    if (!rt.empty())
+      rt += ",";
+    rt += base::IntToString(*it);
+  }
+  return rt;
+}
+
+#if defined(OS_MACOSX)
+void DisplayReconfigCallback(CGDirectDisplayID display,
+                             CGDisplayChangeSummaryFlags flags,
+                             void* gpu_data_manager) {
+  if (flags & kCGDisplayAddFlag) {
+    GpuDataManagerImpl* manager =
+        reinterpret_cast<GpuDataManagerImpl*>(gpu_data_manager);
+    DCHECK(manager);
+    manager->HandleGpuSwitch();
+  }
+}
+#endif  // OS_MACOSX
+
+// Block all domains' use of 3D APIs for this many milliseconds if
+// approaching a threshold where system stability might be compromised.
+const int64 kBlockAllDomainsMs = 10000;
+const int kNumResetsWithinDuration = 1;
+
+// Enums for UMA histograms.
+enum BlockStatusHistogram {
+  BLOCK_STATUS_NOT_BLOCKED,
+  BLOCK_STATUS_SPECIFIC_DOMAIN_BLOCKED,
+  BLOCK_STATUS_ALL_DOMAINS_BLOCKED,
+  BLOCK_STATUS_MAX
+};
+
+}  // namespace anonymous
+
+void GpuDataManagerImplPrivate::InitializeForTesting(
+    const std::string& gpu_blacklist_json,
+    const GPUInfo& gpu_info) {
+  // This function is for testing only, so disable histograms.
+  update_histograms_ = false;
+
+  InitializeImpl(gpu_blacklist_json, std::string(), std::string(), gpu_info);
+}
+
+bool GpuDataManagerImplPrivate::IsFeatureBlacklisted(int feature) const {
+  if (use_swiftshader_) {
+    // Skia's software rendering is probably more efficient than going through
+    // software emulation of the GPU, so use that.
+    if (feature == GPU_FEATURE_TYPE_ACCELERATED_2D_CANVAS)
+      return true;
+    return false;
+  }
+
+  return (blacklisted_features_.count(feature) == 1);
+}
+
+size_t GpuDataManagerImplPrivate::GetBlacklistedFeatureCount() const {
+  if (use_swiftshader_)
+    return 1;
+  return blacklisted_features_.size();
+}
+
+GPUInfo GpuDataManagerImplPrivate::GetGPUInfo() const {
+  return gpu_info_;
+}
+
+void GpuDataManagerImplPrivate::GetGpuProcessHandles(
+    const GpuDataManager::GetGpuProcessHandlesCallback& callback) const {
+  GpuProcessHost::GetProcessHandles(callback);
+}
+
+bool GpuDataManagerImplPrivate::GpuAccessAllowed(
+    std::string* reason) const {
+  if (use_swiftshader_)
+    return true;
+
+  if (!gpu_info_.gpu_accessible) {
+    if (reason) {
+      *reason = "GPU process launch failed.";
+    }
+    return false;
+  }
+
+  if (card_blacklisted_) {
+    if (reason) {
+      *reason = "GPU access is disabled ";
+      CommandLine* command_line = CommandLine::ForCurrentProcess();
+      if (command_line->HasSwitch(switches::kDisableGpu))
+        *reason += "through commandline switch --disable-gpu.";
+      else
+        *reason += "in chrome://settings.";
+    }
+    return false;
+  }
+
+  // We only need to block GPU process if more features are disallowed other
+  // than those in the preliminary gpu feature flags because the latter work
+  // through renderer commandline switches.
+  std::set<int> features = preliminary_blacklisted_features_;
+  MergeFeatureSets(&features, blacklisted_features_);
+  if (features.size() > preliminary_blacklisted_features_.size()) {
+    if (reason) {
+      *reason = "Features are disabled upon full but not preliminary GPU info.";
+    }
+    return false;
+  }
+
+  if (blacklisted_features_.size() == NUMBER_OF_GPU_FEATURE_TYPES) {
+    // On Linux, we use cached GL strings to make blacklist decsions at browser
+    // startup time. We need to launch the GPU process to validate these
+    // strings even if all features are blacklisted. If all GPU features are
+    // disabled, the GPU process will only initialize GL bindings, create a GL
+    // context, and collect full GPU info.
+#if !defined(OS_LINUX)
+    if (reason) {
+      *reason = "All GPU features are blacklisted.";
+    }
+    return false;
+#endif
+  }
+
+  return true;
+}
+
+void GpuDataManagerImplPrivate::RequestCompleteGpuInfoIfNeeded() {
+  if (complete_gpu_info_already_requested_ || gpu_info_.finalized)
+    return;
+  complete_gpu_info_already_requested_ = true;
+
+  GpuProcessHost::SendOnIO(
+#if defined(OS_WIN)
+      GpuProcessHost::GPU_PROCESS_KIND_UNSANDBOXED,
+#else
+      GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
+#endif
+      CAUSE_FOR_GPU_LAUNCH_GPUDATAMANAGER_REQUESTCOMPLETEGPUINFOIFNEEDED,
+      new GpuMsg_CollectGraphicsInfo());
+}
+
+bool GpuDataManagerImplPrivate::IsCompleteGpuInfoAvailable() const {
+  return gpu_info_.finalized;
+}
+
+void GpuDataManagerImplPrivate::RequestVideoMemoryUsageStatsUpdate() const {
+  GpuProcessHost::SendOnIO(
+      GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
+      CAUSE_FOR_GPU_LAUNCH_NO_LAUNCH,
+      new GpuMsg_GetVideoMemoryUsageStats());
+}
+
+bool GpuDataManagerImplPrivate::ShouldUseSwiftShader() const {
+  return use_swiftshader_;
+}
+
+void GpuDataManagerImplPrivate::RegisterSwiftShaderPath(
+    const base::FilePath& path) {
+  swiftshader_path_ = path;
+  EnableSwiftShaderIfNecessary();
+}
+
+void GpuDataManagerImplPrivate::AddObserver(GpuDataManagerObserver* observer) {
+  GpuDataManagerImpl::UnlockedSession session(owner_);
+  observer_list_->AddObserver(observer);
+}
+
+void GpuDataManagerImplPrivate::RemoveObserver(
+    GpuDataManagerObserver* observer) {
+  GpuDataManagerImpl::UnlockedSession session(owner_);
+  observer_list_->RemoveObserver(observer);
+}
+
+void GpuDataManagerImplPrivate::UnblockDomainFrom3DAPIs(const GURL& url) {
+  // This method must do two things:
+  //
+  //  1. If the specific domain is blocked, then unblock it.
+  //
+  //  2. Reset our notion of how many GPU resets have occurred recently.
+  //     This is necessary even if the specific domain was blocked.
+  //     Otherwise, if we call Are3DAPIsBlocked with the same domain right
+  //     after unblocking it, it will probably still be blocked because of
+  //     the recent GPU reset caused by that domain.
+  //
+  // These policies could be refined, but at a certain point the behavior
+  // will become difficult to explain.
+  std::string domain = GetDomainFromURL(url);
+
+  blocked_domains_.erase(domain);
+  timestamps_of_gpu_resets_.clear();
+}
+
+void GpuDataManagerImplPrivate::DisableGpuWatchdog() {
+  GpuProcessHost::SendOnIO(
+      GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
+      CAUSE_FOR_GPU_LAUNCH_NO_LAUNCH,
+      new GpuMsg_DisableWatchdog);
+}
+
+void GpuDataManagerImplPrivate::SetGLStrings(const std::string& gl_vendor,
+                                             const std::string& gl_renderer,
+                                             const std::string& gl_version) {
+  if (gl_vendor.empty() && gl_renderer.empty() && gl_version.empty())
+    return;
+
+  // If GPUInfo already got GL strings, do nothing.  This is for the rare
+  // situation where GPU process collected GL strings before this call.
+  if (!gpu_info_.gl_vendor.empty() ||
+      !gpu_info_.gl_renderer.empty() ||
+      !gpu_info_.gl_version_string.empty())
+    return;
+
+  GPUInfo gpu_info = gpu_info_;
+
+  gpu_info.gl_vendor = gl_vendor;
+  gpu_info.gl_renderer = gl_renderer;
+  gpu_info.gl_version_string = gl_version;
+
+  gpu_info_collector::CollectDriverInfoGL(&gpu_info);
+
+  UpdateGpuInfo(gpu_info);
+  UpdateGpuSwitchingManager(gpu_info);
+  UpdatePreliminaryBlacklistedFeatures();
+}
+
+void GpuDataManagerImplPrivate::GetGLStrings(std::string* gl_vendor,
+                                             std::string* gl_renderer,
+                                             std::string* gl_version) {
+  DCHECK(gl_vendor && gl_renderer && gl_version);
+
+  *gl_vendor = gpu_info_.gl_vendor;
+  *gl_renderer = gpu_info_.gl_renderer;
+  *gl_version = gpu_info_.gl_version_string;
+}
+
+void GpuDataManagerImplPrivate::Initialize() {
+  TRACE_EVENT0("startup", "GpuDataManagerImpl::Initialize");
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kSkipGpuDataLoading))
+    return;
+
+  GPUInfo gpu_info;
+  {
+    TRACE_EVENT0("startup",
+      "GpuDataManagerImpl::Initialize:CollectBasicGraphicsInfo");
+    gpu_info_collector::CollectBasicGraphicsInfo(&gpu_info);
+  }
+#if defined(ARCH_CPU_X86_FAMILY)
+  if (!gpu_info.gpu.vendor_id || !gpu_info.gpu.device_id)
+    gpu_info.finalized = true;
+#endif
+
+  std::string gpu_blacklist_string;
+  std::string gpu_switching_list_string;
+  std::string gpu_driver_bug_list_string;
+  if (!command_line->HasSwitch(switches::kIgnoreGpuBlacklist)) {
+    const base::StringPiece gpu_blacklist_json =
+        GetContentClient()->GetDataResource(
+            IDR_GPU_BLACKLIST, ui::SCALE_FACTOR_NONE);
+    gpu_blacklist_string = gpu_blacklist_json.as_string();
+    const base::StringPiece gpu_switching_list_json =
+        GetContentClient()->GetDataResource(
+            IDR_GPU_SWITCHING_LIST, ui::SCALE_FACTOR_NONE);
+    gpu_switching_list_string = gpu_switching_list_json.as_string();
+  }
+  if (!command_line->HasSwitch(switches::kDisableGpuDriverBugWorkarounds)) {
+    const base::StringPiece gpu_driver_bug_list_json =
+        GetContentClient()->GetDataResource(
+            IDR_GPU_DRIVER_BUG_LIST, ui::SCALE_FACTOR_NONE);
+    gpu_driver_bug_list_string = gpu_driver_bug_list_json.as_string();
+  }
+  InitializeImpl(gpu_blacklist_string,
+                 gpu_switching_list_string,
+                 gpu_driver_bug_list_string,
+                 gpu_info);
+  // We pass down the list to GPU command buffer through commandline
+  // switches at GPU process launch. However, in situations where we don't
+  // have a GPU process, we append the browser process commandline.
+  if (command_line->HasSwitch(switches::kSingleProcess) ||
+      command_line->HasSwitch(switches::kInProcessGPU)) {
+    if (!gpu_driver_bugs_.empty()) {
+      command_line->AppendSwitchASCII(switches::kGpuDriverBugWorkarounds,
+                                      IntSetToString(gpu_driver_bugs_));
+    }
+  }
+}
+
+void GpuDataManagerImplPrivate::UpdateGpuInfo(const GPUInfo& gpu_info) {
+  // No further update of gpu_info if falling back to SwiftShader.
+  if (use_swiftshader_)
+    return;
+
+  gpu_info_collector::MergeGPUInfo(&gpu_info_, gpu_info);
+  complete_gpu_info_already_requested_ =
+      complete_gpu_info_already_requested_ || gpu_info_.finalized;
+
+  GetContentClient()->SetGpuInfo(gpu_info_);
+
+  if (gpu_blacklist_) {
+    std::set<int> features = gpu_blacklist_->MakeDecision(
+        GpuControlList::kOsAny, std::string(), gpu_info_);
+    if (update_histograms_)
+      UpdateStats(gpu_blacklist_.get(), features);
+
+    UpdateBlacklistedFeatures(features);
+  }
+  if (gpu_switching_list_) {
+    std::set<int> option = gpu_switching_list_->MakeDecision(
+        GpuControlList::kOsAny, std::string(), gpu_info_);
+    if (option.size() == 1) {
+      // Blacklist decision should not overwrite commandline switch from users.
+      CommandLine* command_line = CommandLine::ForCurrentProcess();
+      if (!command_line->HasSwitch(switches::kGpuSwitching))
+        gpu_switching_ = static_cast<GpuSwitchingOption>(*(option.begin()));
+    }
+  }
+  if (gpu_driver_bug_list_)
+    gpu_driver_bugs_ = gpu_driver_bug_list_->MakeDecision(
+        GpuControlList::kOsAny, std::string(), gpu_info_);
+
+  // We have to update GpuFeatureType before notify all the observers.
+  NotifyGpuInfoUpdate();
+}
+
+void GpuDataManagerImplPrivate::UpdateVideoMemoryUsageStats(
+    const GPUVideoMemoryUsageStats& video_memory_usage_stats) {
+  GpuDataManagerImpl::UnlockedSession session(owner_);
+  observer_list_->Notify(&GpuDataManagerObserver::OnVideoMemoryUsageStatsUpdate,
+                         video_memory_usage_stats);
+}
+
+void GpuDataManagerImplPrivate::AppendRendererCommandLine(
+    CommandLine* command_line) const {
+  DCHECK(command_line);
+
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_WEBGL)) {
+#if !defined(OS_ANDROID)
+    if (!command_line->HasSwitch(switches::kDisableExperimentalWebGL))
+      command_line->AppendSwitch(switches::kDisableExperimentalWebGL);
+#endif
+    if (!command_line->HasSwitch(switches::kDisablePepper3d))
+      command_line->AppendSwitch(switches::kDisablePepper3d);
+  }
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_MULTISAMPLING) &&
+      !command_line->HasSwitch(switches::kDisableGLMultisampling))
+    command_line->AppendSwitch(switches::kDisableGLMultisampling);
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_ACCELERATED_COMPOSITING) &&
+      !command_line->HasSwitch(switches::kDisableAcceleratedCompositing))
+    command_line->AppendSwitch(switches::kDisableAcceleratedCompositing);
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_ACCELERATED_2D_CANVAS) &&
+      !command_line->HasSwitch(switches::kDisableAccelerated2dCanvas))
+    command_line->AppendSwitch(switches::kDisableAccelerated2dCanvas);
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_ACCELERATED_VIDEO_DECODE) &&
+      !command_line->HasSwitch(switches::kDisableAcceleratedVideoDecode))
+    command_line->AppendSwitch(switches::kDisableAcceleratedVideoDecode);
+  if (ShouldUseSwiftShader())
+    command_line->AppendSwitch(switches::kDisableFlashFullscreen3d);
+}
+
+void GpuDataManagerImplPrivate::AppendGpuCommandLine(
+    CommandLine* command_line) const {
+  DCHECK(command_line);
+
+  std::string use_gl =
+      CommandLine::ForCurrentProcess()->GetSwitchValueASCII(switches::kUseGL);
+  base::FilePath swiftshader_path =
+      CommandLine::ForCurrentProcess()->GetSwitchValuePath(
+          switches::kSwiftShaderPath);
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_MULTISAMPLING) &&
+      !command_line->HasSwitch(switches::kDisableGLMultisampling))
+    command_line->AppendSwitch(switches::kDisableGLMultisampling);
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_TEXTURE_SHARING))
+    command_line->AppendSwitch(switches::kDisableImageTransportSurface);
+
+  if (use_swiftshader_) {
+    command_line->AppendSwitchASCII(switches::kUseGL, "swiftshader");
+    if (swiftshader_path.empty())
+      swiftshader_path = swiftshader_path_;
+  } else if ((IsFeatureBlacklisted(GPU_FEATURE_TYPE_WEBGL) ||
+              IsFeatureBlacklisted(GPU_FEATURE_TYPE_ACCELERATED_COMPOSITING) ||
+              IsFeatureBlacklisted(GPU_FEATURE_TYPE_ACCELERATED_2D_CANVAS)) &&
+      (use_gl == "any")) {
+    command_line->AppendSwitchASCII(
+        switches::kUseGL, gfx::kGLImplementationOSMesaName);
+  } else if (!use_gl.empty()) {
+    command_line->AppendSwitchASCII(switches::kUseGL, use_gl);
+  }
+  if (ui::GpuSwitchingManager::GetInstance()->SupportsDualGpus()) {
+    command_line->AppendSwitchASCII(switches::kSupportsDualGpus, "true");
+    switch (gpu_switching_) {
+      case GPU_SWITCHING_OPTION_FORCE_DISCRETE:
+        command_line->AppendSwitchASCII(switches::kGpuSwitching,
+            switches::kGpuSwitchingOptionNameForceDiscrete);
+        break;
+      case GPU_SWITCHING_OPTION_FORCE_INTEGRATED:
+        command_line->AppendSwitchASCII(switches::kGpuSwitching,
+            switches::kGpuSwitchingOptionNameForceIntegrated);
+        break;
+      case GPU_SWITCHING_OPTION_AUTOMATIC:
+      case GPU_SWITCHING_OPTION_UNKNOWN:
+        break;
+    }
+  } else {
+    command_line->AppendSwitchASCII(switches::kSupportsDualGpus, "false");
+  }
+
+  if (!swiftshader_path.empty())
+    command_line->AppendSwitchPath(switches::kSwiftShaderPath,
+                                   swiftshader_path);
+
+  if (!gpu_driver_bugs_.empty()) {
+    command_line->AppendSwitchASCII(switches::kGpuDriverBugWorkarounds,
+                                    IntSetToString(gpu_driver_bugs_));
+  }
+
+#if defined(OS_WIN)
+  // DisplayLink 7.1 and earlier can cause the GPU process to crash on startup.
+  // http://crbug.com/177611
+  // Thinkpad USB Port Replicator driver causes GPU process to crash when the
+  // sandbox is enabled. http://crbug.com/181665.
+  if ((gpu_info_.display_link_version.IsValid()
+      && gpu_info_.display_link_version.IsOlderThan("7.2")) ||
+      gpu_info_.lenovo_dcute) {
+    command_line->AppendSwitch(switches::kReduceGpuSandbox);
+  }
+#endif
+
+  if (gpu_info_.optimus)
+    command_line->AppendSwitch(switches::kReduceGpuSandbox);
+  if (gpu_info_.amd_switchable) {
+    // The image transport surface currently doesn't work with AMD Dynamic
+    // Switchable graphics.
+    command_line->AppendSwitch(switches::kReduceGpuSandbox);
+    command_line->AppendSwitch(switches::kDisableImageTransportSurface);
+  }
+  // Pass GPU and driver information to GPU process. We try to avoid full GPU
+  // info collection at GPU process startup, but we need gpu vendor_id,
+  // device_id, driver_vendor, driver_version for deciding whether we need to
+  // collect full info (on Linux) and for crash reporting purpose.
+  command_line->AppendSwitchASCII(switches::kGpuVendorID,
+      base::StringPrintf("0x%04x", gpu_info_.gpu.vendor_id));
+  command_line->AppendSwitchASCII(switches::kGpuDeviceID,
+      base::StringPrintf("0x%04x", gpu_info_.gpu.device_id));
+  command_line->AppendSwitchASCII(switches::kGpuDriverVendor,
+      gpu_info_.driver_vendor);
+  command_line->AppendSwitchASCII(switches::kGpuDriverVersion,
+      gpu_info_.driver_version);
+}
+
+void GpuDataManagerImplPrivate::AppendPluginCommandLine(
+    CommandLine* command_line) const {
+  DCHECK(command_line);
+
+#if defined(OS_MACOSX)
+  // TODO(jbauman): Add proper blacklist support for core animation plugins so
+  // special-casing this video card won't be necessary. See
+  // http://crbug.com/134015
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_ACCELERATED_COMPOSITING) ||
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableAcceleratedCompositing)) {
+    if (!command_line->HasSwitch(
+           switches::kDisableCoreAnimationPlugins))
+      command_line->AppendSwitch(
+          switches::kDisableCoreAnimationPlugins);
+  }
+#endif
+}
+
+void GpuDataManagerImplPrivate::UpdateRendererWebPrefs(
+    WebPreferences* prefs) const {
+  DCHECK(prefs);
+
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_ACCELERATED_COMPOSITING))
+    prefs->accelerated_compositing_enabled = false;
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_WEBGL))
+    prefs->experimental_webgl_enabled = false;
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_FLASH3D))
+    prefs->flash_3d_enabled = false;
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_FLASH_STAGE3D)) {
+    prefs->flash_stage3d_enabled = false;
+    prefs->flash_stage3d_baseline_enabled = false;
+  }
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_FLASH_STAGE3D_BASELINE))
+    prefs->flash_stage3d_baseline_enabled = false;
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_ACCELERATED_2D_CANVAS))
+    prefs->accelerated_2d_canvas_enabled = false;
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_MULTISAMPLING))
+    prefs->gl_multisampling_enabled = false;
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_3D_CSS)) {
+    prefs->accelerated_compositing_for_3d_transforms_enabled = false;
+    prefs->accelerated_compositing_for_animation_enabled = false;
+  }
+  if (IsFeatureBlacklisted(GPU_FEATURE_TYPE_ACCELERATED_VIDEO))
+    prefs->accelerated_compositing_for_video_enabled = false;
+
+  // Accelerated video and animation are slower than regular when using
+  // SwiftShader. 3D CSS may also be too slow to be worthwhile.
+  if (ShouldUseSwiftShader()) {
+    prefs->accelerated_compositing_for_video_enabled = false;
+    prefs->accelerated_compositing_for_animation_enabled = false;
+    prefs->accelerated_compositing_for_3d_transforms_enabled = false;
+    prefs->accelerated_compositing_for_plugins_enabled = false;
+  }
+}
+
+GpuSwitchingOption GpuDataManagerImplPrivate::GetGpuSwitchingOption() const {
+  if (!ui::GpuSwitchingManager::GetInstance()->SupportsDualGpus())
+    return GPU_SWITCHING_OPTION_UNKNOWN;
+  return gpu_switching_;
+}
+
+void GpuDataManagerImplPrivate::DisableHardwareAcceleration() {
+  card_blacklisted_ = true;
+
+  for (int i = 0; i < NUMBER_OF_GPU_FEATURE_TYPES; ++i)
+    blacklisted_features_.insert(i);
+
+  EnableSwiftShaderIfNecessary();
+  NotifyGpuInfoUpdate();
+}
+
+std::string GpuDataManagerImplPrivate::GetBlacklistVersion() const {
+  if (gpu_blacklist_)
+    return gpu_blacklist_->version();
+  return "0";
+}
+
+base::ListValue* GpuDataManagerImplPrivate::GetBlacklistReasons() const {
+  ListValue* reasons = new ListValue();
+  if (gpu_blacklist_)
+    gpu_blacklist_->GetReasons(reasons);
+  return reasons;
+}
+
+void GpuDataManagerImplPrivate::AddLogMessage(
+    int level, const std::string& header, const std::string& message) {
+  DictionaryValue* dict = new DictionaryValue();
+  dict->SetInteger("level", level);
+  dict->SetString("header", header);
+  dict->SetString("message", message);
+  log_messages_.Append(dict);
+}
+
+void GpuDataManagerImplPrivate::ProcessCrashed(
+    base::TerminationStatus exit_code) {
+  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
+    // Unretained is ok, because it's posted to UI thread, the thread
+    // where the singleton GpuDataManagerImpl lives until the end.
+    BrowserThread::PostTask(
+        BrowserThread::UI,
+        FROM_HERE,
+        base::Bind(&GpuDataManagerImpl::ProcessCrashed,
+                   base::Unretained(owner_),
+                   exit_code));
+    return;
+  }
+  {
+    GpuDataManagerImpl::UnlockedSession session(owner_);
+    observer_list_->Notify(
+        &GpuDataManagerObserver::OnGpuProcessCrashed, exit_code);
+  }
+}
+
+base::ListValue* GpuDataManagerImplPrivate::GetLogMessages() const {
+  base::ListValue* value;
+  value = log_messages_.DeepCopy();
+  return value;
+}
+
+void GpuDataManagerImplPrivate::HandleGpuSwitch() {
+  GpuDataManagerImpl::UnlockedSession session(owner_);
+  observer_list_->Notify(&GpuDataManagerObserver::OnGpuSwitching);
+}
+
+#if defined(OS_WIN)
+bool GpuDataManagerImplPrivate::IsUsingAcceleratedSurface() const {
+  if (base::win::GetVersion() < base::win::VERSION_VISTA)
+    return false;
+
+  if (gpu_info_.amd_switchable)
+    return false;
+  if (use_swiftshader_)
+    return false;
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kDisableImageTransportSurface))
+    return false;
+  return !IsFeatureBlacklisted(GPU_FEATURE_TYPE_TEXTURE_SHARING);
+}
+#endif
+
+void GpuDataManagerImplPrivate::BlockDomainFrom3DAPIs(
+    const GURL& url, GpuDataManagerImpl::DomainGuilt guilt) {
+  BlockDomainFrom3DAPIsAtTime(url, guilt, base::Time::Now());
+}
+
+bool GpuDataManagerImplPrivate::Are3DAPIsBlocked(const GURL& url,
+                                                 int render_process_id,
+                                                 int render_view_id,
+                                                 ThreeDAPIType requester) {
+  bool blocked = Are3DAPIsBlockedAtTime(url, base::Time::Now()) !=
+      GpuDataManagerImpl::DOMAIN_BLOCK_STATUS_NOT_BLOCKED;
+  if (blocked) {
+    // Unretained is ok, because it's posted to UI thread, the thread
+    // where the singleton GpuDataManagerImpl lives until the end.
+    BrowserThread::PostTask(
+        BrowserThread::UI, FROM_HERE,
+        base::Bind(&GpuDataManagerImpl::Notify3DAPIBlocked,
+                   base::Unretained(owner_), url, render_process_id,
+                   render_view_id, requester));
+  }
+
+  return blocked;
+}
+
+void GpuDataManagerImplPrivate::DisableDomainBlockingFor3DAPIsForTesting() {
+  domain_blocking_enabled_ = false;
+}
+
+// static
+GpuDataManagerImplPrivate* GpuDataManagerImplPrivate::Create(
+    GpuDataManagerImpl* owner) {
+  return new GpuDataManagerImplPrivate(owner);
+}
+
+GpuDataManagerImplPrivate::GpuDataManagerImplPrivate(
+    GpuDataManagerImpl* owner)
+    : complete_gpu_info_already_requested_(false),
+      gpu_switching_(GPU_SWITCHING_OPTION_AUTOMATIC),
+      observer_list_(new GpuDataManagerObserverList),
+      use_swiftshader_(false),
+      card_blacklisted_(false),
+      update_histograms_(true),
+      window_count_(0),
+      domain_blocking_enabled_(true),
+      owner_(owner) {
+  DCHECK(owner_);
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kDisableAcceleratedCompositing)) {
+    command_line->AppendSwitch(switches::kDisableAccelerated2dCanvas);
+    command_line->AppendSwitch(switches::kDisableAcceleratedLayers);
+  }
+  if (command_line->HasSwitch(switches::kDisableGpu))
+    DisableHardwareAcceleration();
+  if (command_line->HasSwitch(switches::kGpuSwitching)) {
+    std::string option_string = command_line->GetSwitchValueASCII(
+        switches::kGpuSwitching);
+    GpuSwitchingOption option = StringToGpuSwitchingOption(option_string);
+    if (option != GPU_SWITCHING_OPTION_UNKNOWN)
+      gpu_switching_ = option;
+  }
+
+#if defined(OS_MACOSX)
+  CGDisplayRegisterReconfigurationCallback(DisplayReconfigCallback, owner_);
+#endif  // OS_MACOSX
+}
+
+GpuDataManagerImplPrivate::~GpuDataManagerImplPrivate() {
+#if defined(OS_MACOSX)
+  CGDisplayRemoveReconfigurationCallback(DisplayReconfigCallback, owner_);
+#endif
+}
+
+void GpuDataManagerImplPrivate::InitializeImpl(
+    const std::string& gpu_blacklist_json,
+    const std::string& gpu_switching_list_json,
+    const std::string& gpu_driver_bug_list_json,
+    const GPUInfo& gpu_info) {
+  std::string browser_version_string = ProcessVersionString(
+      GetContentClient()->GetProduct());
+  CHECK(!browser_version_string.empty());
+
+  if (!gpu_blacklist_json.empty()) {
+    gpu_blacklist_.reset(GpuBlacklist::Create());
+    gpu_blacklist_->LoadList(
+        browser_version_string, gpu_blacklist_json,
+        GpuControlList::kCurrentOsOnly);
+  }
+  if (!gpu_switching_list_json.empty()) {
+    gpu_switching_list_.reset(GpuSwitchingList::Create());
+    gpu_switching_list_->LoadList(
+        browser_version_string, gpu_switching_list_json,
+        GpuControlList::kCurrentOsOnly);
+  }
+  if (!gpu_driver_bug_list_json.empty()) {
+    gpu_driver_bug_list_.reset(GpuDriverBugList::Create());
+    gpu_driver_bug_list_->LoadList(
+        browser_version_string, gpu_driver_bug_list_json,
+        GpuControlList::kCurrentOsOnly);
+  }
+
+  gpu_info_ = gpu_info;
+  UpdateGpuInfo(gpu_info);
+  UpdateGpuSwitchingManager(gpu_info);
+  UpdatePreliminaryBlacklistedFeatures();
+}
+
+void GpuDataManagerImplPrivate::UpdateBlacklistedFeatures(
+    const std::set<int>& features) {
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  blacklisted_features_ = features;
+
+  // Force disable using the GPU for these features, even if they would
+  // otherwise be allowed.
+  if (card_blacklisted_ ||
+      command_line->HasSwitch(switches::kBlacklistAcceleratedCompositing)) {
+    blacklisted_features_.insert(GPU_FEATURE_TYPE_ACCELERATED_COMPOSITING);
+  }
+  if (card_blacklisted_ ||
+      command_line->HasSwitch(switches::kBlacklistWebGL)) {
+    blacklisted_features_.insert(GPU_FEATURE_TYPE_WEBGL);
+  }
+
+  EnableSwiftShaderIfNecessary();
+}
+
+void GpuDataManagerImplPrivate::UpdatePreliminaryBlacklistedFeatures() {
+  preliminary_blacklisted_features_ = blacklisted_features_;
+}
+
+void GpuDataManagerImplPrivate::UpdateGpuSwitchingManager(
+    const GPUInfo& gpu_info) {
+  ui::GpuSwitchingManager::GetInstance()->SetGpuCount(
+      gpu_info.secondary_gpus.size() + 1);
+
+  if (ui::GpuSwitchingManager::GetInstance()->SupportsDualGpus()) {
+    switch (gpu_switching_) {
+      case GPU_SWITCHING_OPTION_FORCE_DISCRETE:
+        ui::GpuSwitchingManager::GetInstance()->ForceUseOfDiscreteGpu();
+        break;
+      case GPU_SWITCHING_OPTION_FORCE_INTEGRATED:
+        ui::GpuSwitchingManager::GetInstance()->ForceUseOfIntegratedGpu();
+        break;
+      case GPU_SWITCHING_OPTION_AUTOMATIC:
+      case GPU_SWITCHING_OPTION_UNKNOWN:
+        break;
+    }
+  }
+}
+
+void GpuDataManagerImplPrivate::NotifyGpuInfoUpdate() {
+  observer_list_->Notify(&GpuDataManagerObserver::OnGpuInfoUpdate);
+}
+
+void GpuDataManagerImplPrivate::EnableSwiftShaderIfNecessary() {
+  if (!GpuAccessAllowed(NULL) ||
+      blacklisted_features_.count(GPU_FEATURE_TYPE_WEBGL)) {
+    if (!swiftshader_path_.empty() &&
+        !CommandLine::ForCurrentProcess()->HasSwitch(
+             switches::kDisableSoftwareRasterizer))
+      use_swiftshader_ = true;
+  }
+}
+
+std::string GpuDataManagerImplPrivate::GetDomainFromURL(
+    const GURL& url) const {
+  // For the moment, we just use the host, or its IP address, as the
+  // entry in the set, rather than trying to figure out the top-level
+  // domain. This does mean that a.foo.com and b.foo.com will be
+  // treated independently in the blocking of a given domain, but it
+  // would require a third-party library to reliably figure out the
+  // top-level domain from a URL.
+  if (!url.has_host()) {
+    return std::string();
+  }
+
+  return url.host();
+}
+
+void GpuDataManagerImplPrivate::BlockDomainFrom3DAPIsAtTime(
+    const GURL& url,
+    GpuDataManagerImpl::DomainGuilt guilt,
+    base::Time at_time) {
+  if (!domain_blocking_enabled_)
+    return;
+
+  std::string domain = GetDomainFromURL(url);
+
+  DomainBlockEntry& entry = blocked_domains_[domain];
+  entry.last_guilt = guilt;
+  timestamps_of_gpu_resets_.push_back(at_time);
+}
+
+GpuDataManagerImpl::DomainBlockStatus
+GpuDataManagerImplPrivate::Are3DAPIsBlockedAtTime(
+    const GURL& url, base::Time at_time) const {
+  if (!domain_blocking_enabled_)
+    return GpuDataManagerImpl::DOMAIN_BLOCK_STATUS_NOT_BLOCKED;
+
+  // Note: adjusting the policies in this code will almost certainly
+  // require adjusting the associated unit tests.
+  std::string domain = GetDomainFromURL(url);
+
+  DomainBlockMap::const_iterator iter = blocked_domains_.find(domain);
+  if (iter != blocked_domains_.end()) {
+    // Err on the side of caution, and assume that if a particular
+    // domain shows up in the block map, it's there for a good
+    // reason and don't let its presence there automatically expire.
+
+    UMA_HISTOGRAM_ENUMERATION("GPU.BlockStatusForClient3DAPIs",
+                              BLOCK_STATUS_SPECIFIC_DOMAIN_BLOCKED,
+                              BLOCK_STATUS_MAX);
+
+    return GpuDataManagerImpl::DOMAIN_BLOCK_STATUS_BLOCKED;
+  }
+
+  // Look at the timestamps of the recent GPU resets to see if there are
+  // enough within the threshold which would cause us to blacklist all
+  // domains. This doesn't need to be overly precise -- if time goes
+  // backward due to a system clock adjustment, that's fine.
+  //
+  // TODO(kbr): make this pay attention to the TDR thresholds in the
+  // Windows registry, but make sure it continues to be testable.
+  {
+    std::list<base::Time>::iterator iter = timestamps_of_gpu_resets_.begin();
+    int num_resets_within_timeframe = 0;
+    while (iter != timestamps_of_gpu_resets_.end()) {
+      base::Time time = *iter;
+      base::TimeDelta delta_t = at_time - time;
+
+      // If this entry has "expired", just remove it.
+      if (delta_t.InMilliseconds() > kBlockAllDomainsMs) {
+        iter = timestamps_of_gpu_resets_.erase(iter);
+        continue;
+      }
+
+      ++num_resets_within_timeframe;
+      ++iter;
+    }
+
+    if (num_resets_within_timeframe >= kNumResetsWithinDuration) {
+      UMA_HISTOGRAM_ENUMERATION("GPU.BlockStatusForClient3DAPIs",
+                                BLOCK_STATUS_ALL_DOMAINS_BLOCKED,
+                                BLOCK_STATUS_MAX);
+
+      return GpuDataManagerImpl::DOMAIN_BLOCK_STATUS_ALL_DOMAINS_BLOCKED;
+    }
+  }
+
+  UMA_HISTOGRAM_ENUMERATION("GPU.BlockStatusForClient3DAPIs",
+                            BLOCK_STATUS_NOT_BLOCKED,
+                            BLOCK_STATUS_MAX);
+
+  return GpuDataManagerImpl::DOMAIN_BLOCK_STATUS_NOT_BLOCKED;
+}
+
+int64 GpuDataManagerImplPrivate::GetBlockAllDomainsDurationInMs() const {
+  return kBlockAllDomainsMs;
+}
+
+void GpuDataManagerImplPrivate::Notify3DAPIBlocked(const GURL& url,
+                                                   int render_process_id,
+                                                   int render_view_id,
+                                                   ThreeDAPIType requester) {
+  GpuDataManagerImpl::UnlockedSession session(owner_);
+  observer_list_->Notify(&GpuDataManagerObserver::DidBlock3DAPIs,
+                         url, render_process_id, render_view_id, requester);
+}
+
+}  // namespace content
+