libchrome: Several upstreamable fixes from libchrome

base/threading/thread_restrictions.h

Index: base/threading/thread_restrictions.h
diff --git a/base/threading/thread_restrictions.h b/base/threading/thread_restrictions.h
index 92b7bd5b2f6d4e31a39f604f1818544f16f3c8eb..d8e3cb1b55bf1260272a660b07407255de8bf952 100644
--- a/base/threading/thread_restrictions.h
+++ b/base/threading/thread_restrictions.h
@@ -180,9 +180,9 @@ class BASE_EXPORT ThreadRestrictions {
 #else
   // Inline the empty definitions of these functions so that they can be
   // compiled out.
-  static bool SetIOAllowed(bool allowed) { return true; }
+  static bool SetIOAllowed(bool) { return true; }
   static void AssertIOAllowed() {}
-  static bool SetSingletonAllowed(bool allowed) { return true; }
+  static bool SetSingletonAllowed(bool) { return true; }
   static void AssertSingletonAllowed() {}
   static void DisallowWaiting() {}
   static void AssertWaitAllowed() {}
@@ -243,7 +243,7 @@ class BASE_EXPORT ThreadRestrictions {
 #if ENABLE_THREAD_RESTRICTIONS
   static bool SetWaitAllowed(bool allowed);
 #else
-  static bool SetWaitAllowed(bool allowed) { return true; }
+  static bool SetWaitAllowed(bool) { return true; }
 #endif
 
   // Constructing a ScopedAllowWait temporarily allows waiting on the current