Fix build error with tcmalloc for android

third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak.h

Index: third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak.h
diff --git a/third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak.h b/third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak.h
index 3b858caa444261e5d36e6586fb3f39eb46c29907..2204dfd50738808af959a9ef9b33ac2620a83a85 100644
--- a/third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak.h
+++ b/third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak.h
@@ -94,7 +94,12 @@ extern "C" {
   struct mallinfo mallinfo(void) __THROW          ALIAS(tc_mallinfo);
 #endif
   size_t malloc_size(void* p) __THROW             ALIAS(tc_malloc_size);
+#if defined(__ANDROID__)
+  size_t malloc_usable_size(const void* p) __THROW
+         ALIAS(tc_malloc_size);
+#else
   size_t malloc_usable_size(void* p) __THROW      ALIAS(tc_malloc_size);
+#endif
 }   // extern "C"
 
 #undef ALIAS