Inject GPUDataManager support into ash to abstract a content dependency.

ash/accelerators/accelerator_controller.cc

Index: ash/accelerators/accelerator_controller.cc
diff --git a/ash/accelerators/accelerator_controller.cc b/ash/accelerators/accelerator_controller.cc
index c4e6691d1b6eaabf4d2aa2f2ffdd054a2c1b656e..b7a51cfb50a6a5ea6b9fa8f107c11f879a592fe9 100644
--- a/ash/accelerators/accelerator_controller.cc
+++ b/ash/accelerators/accelerator_controller.cc
@@ -18,6 +18,7 @@
 #include "ash/display/display_controller.h"
 #include "ash/display/display_manager.h"
 #include "ash/focus_cycler.h"
+#include "ash/gpu_support.h"
 #include "ash/ime_control_delegate.h"
 #include "ash/magnifier/magnification_controller.h"
 #include "ash/magnifier/partial_magnification_controller.h"
@@ -55,7 +56,6 @@
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/metrics/user_metrics.h"
-#include "content/public/browser/gpu_data_manager.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/accelerators/accelerator.h"
@@ -968,7 +968,7 @@ bool AcceleratorController::PerformAction(int action,
     case TOUCH_HUD_PROJECTION_TOGGLE:
       return HandleTouchHudProjectToggle();
     case DISABLE_GPU_WATCHDOG:
-      content::GpuDataManager::GetInstance()->DisableGpuWatchdog();
+      Shell::GetInstance()->gpu_support()->DisableGpuWatchdog();
       return true;
 #endif  // OS_CHROMEOS
     case OPEN_FEEDBACK_PAGE: