| Index: content/public/common/content_switches.cc
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| diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
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| index e2cf9e5cdf66701e204df998c1a3bbb46419b8f6..92b7dc4ccc2652564ca6fd882fbaff3d7b47d0a7 100644
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| --- a/content/public/common/content_switches.cc
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| +++ b/content/public/common/content_switches.cc
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| @@ -90,6 +90,11 @@ const char kDisableAcceleratedVideoDecode[] =
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|  // users with many windows/tabs and lots of memory.
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|  const char kDisableBackingStoreLimit[]      = "disable-backing-store-limit";
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|  
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| +// Disable backgrounding renders for occluded windows. Done for tests to avoid
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| +// nondeterministic behavior.
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| +extern const char kDisableBackgroundingOccludedWindowsForTesting[] =
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| +    "disable-backgrounding-occluded-windows";
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| +
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|  // Disable one or more Blink runtime-enabled features.
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|  // Use names from RuntimeEnabledFeatures.in, separated by commas.
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|  // Applied after kEnableBlinkFeatures, and after other flags that change these
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| 
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