OS::ArmUsingHardFloat returns bogus value for clang-built chrome.

src/base/platform/platform-linux.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Platform-specific code for Linux goes here. For the POSIX-compatible
 // parts, the implementation is in platform-posix.cc.
 
 #include <pthread.h>
 #include <semaphore.h>
 #include <signal.h>
@@ skipping 54 matching lines @@
   // the Floating Point ABI used (PCS stands for Procedure Call Standard).
   // We use these as well as a couple of other defines to statically determine
   // what FP ABI used.
   // GCC versions 4.4 and below don't support hard-fp.
   // GCC versions 4.5 may support hard-fp without defining __ARM_PCS or
   // __ARM_PCS_VFP.
 
 #define GCC_VERSION (__GNUC__ * 10000                                          \
                      + __GNUC_MINOR__ * 100                                    \
                      + __GNUC_PATCHLEVEL__)
-#if GCC_VERSION >= 40600
+#if GCC_VERSION >= 40600 && !defined(__clang__)
 #if defined(__ARM_PCS_VFP)
   return true;
 #else
   return false;
 #endif
 
-#elif GCC_VERSION < 40500
+#elif GCC_VERSION < 40500 && !defined(__clang__)
   return false;
 
 #else
 #if defined(__ARM_PCS_VFP)
   return true;
 #elif defined(__ARM_PCS) || defined(__SOFTFP__) || defined(__SOFTFP) || \
       !defined(__VFP_FP__)
   return false;
 #else
-#error "Your version of GCC does not report the FP ABI compiled for."          \
+#error "Your version of compiler does not report the FP ABI compiled for."     \
        "Please report it on this issue"                                        \
        "http://code.google.com/p/v8/issues/detail?id=2140"
 
 #endif
 #endif
 #undef GCC_VERSION
 }
 
 #endif  // def __arm__
 
@@ skipping 280 matching lines @@
   return munmap(base, size) == 0;
 }
 
 
 bool VirtualMemory::HasLazyCommits() {
   return true;
 }
 
 }  // namespace base
 }  // namespace v8