Initial implementation of API WakeLock.

content/public/browser/browser_context.h

Index: content/public/browser/browser_context.h
diff --git a/content/public/browser/browser_context.h b/content/public/browser/browser_context.h
index 1c09777f42b2bd6690fa39a40dbd56b033b79911..151b2bb5b0f1a772c5dffee165138d267731c7ab 100644
--- a/content/public/browser/browser_context.h
+++ b/content/public/browser/browser_context.h
@@ -40,6 +40,7 @@ class PushMessagingService;
 class ResourceContext;
 class SiteInstance;
 class StoragePartition;
+class WakeLockPermissionContext;
 
 // This class holds the context needed for a browsing session.
 // It lives on the UI thread. All these methods must only be called on the UI
@@ -144,6 +145,7 @@ class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
 
   // Returns a special storage policy implementation, or NULL.
   virtual quota::SpecialStoragePolicy* GetSpecialStoragePolicy() = 0;
+  virtual WakeLockPermissionContext* GetWakeLockPermissionContext() = 0;
 
   // Returns a push messaging service. The embedder owns the service, and is
   // responsible for ensuring that it outlives RenderProcessHost. It's valid to