Add UMA stats for GPU feature disable checkbox.

tools/metrics/actions/chromeactions.txt

Index: tools/metrics/actions/chromeactions.txt
===================================================================
--- tools/metrics/actions/chromeactions.txt	(revision 193279)
+++ tools/metrics/actions/chromeactions.txt	(working copy)
@@ -250,10 +250,12 @@
 0x1f885e1523585d6f	ClearBrowsingData_MaskContainsUnprotectedWeb
 0x511e8366cdda3890	ClearBrowsingData_Passwords
 0x3db76495a0acc98c	ClearBrowsingData_ServerBoundCerts
+0xdaaff0c5b7682b18	ClearBrowsingData_ShaderCache
 0x6d69a061f7adf595	ClearBrowsingData_ShowDlg
 0x9fd631c62234969a	ClearSelection
 0x49c37636ddeb5a10	ClearSiteDataOnExitDisabled
 0xf63362e0c7d7420d	ClearSiteDataOnExitEnabled
+0xdf8129e4f853f264	ClickDisableGpuAcceleration
 0xf2c974774a0fd57e	ClickToPlay_AllowAlways
 0x3589e51b0b1bf730	ClickToPlay_Dismiss_Infobar
 0xe1b2d67ea37c5ba0	ClickToPlay_InfobarShown
@@ -398,6 +400,8 @@
 0xc06f4ecf7cf01b27	GoogleNow.ButtonClicked1
 0x813aeef215b68741	GoogleNow.Dismissed
 0x436c20892470d838	GoogleNow.MessageClicked
+0xd6c29b06a8c7e3e2	GpuAccelerationDisabled
+0xd18fed7efb6cf062	GpuAccelerationEnabled
 0x696c3c52634726aa	HiliteColor
 0x4869b7ac0caae3fe	History_DeleteHistory
 0xddf00e6e13ebc7ab	History_DragIcon
@@ -978,6 +982,7 @@
 0xa29f3f7e4bb25494	ManagedMode_NewManagedUserWindow
 0x29c1bda4ed1db0e0	ManagedMode_OpenPassphraseDialog
 0x238d1563c0fa1ce2	ManagedMode_OpenSettings
+0x0b747e86c82229bc	ManagedMode_StartupEnableManagedSwitch
 0x9f5c6206cd6609b6	ManagedMode_StartupManagedSwitch
 0x91519377450fa09e	ManagedMode_StartupNoManagedSwitch
 0x9c4e110de24ddbfb	MaxButton_MaxLeft