Fix presubmit error. Trailing whitespace.

TBR=erik.corry
Review URL: http://codereview.chromium.org/2224007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4746 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/codegen-arm.cc

@@ -72,7 +72,7 @@ static bool IsEasyToMultiplyBy(int x);
 // Platform-specific DeferredCode functions.
 
 void DeferredCode::SaveRegisters() {
-  // On ARM you either have a completely spilled frame or you 
+  // On ARM you either have a completely spilled frame or you
   // handle it yourself, but at the moment there's no automation
   // of registers and deferred code.
 }