A64: Synchronize with r16993.

include/v8-defaults.h

Index: include/v8-defaults.h
diff --git a/src/a64/frames-a64.cc b/include/v8-defaults.h
similarity index 72%
copy from src/a64/frames-a64.cc
copy to include/v8-defaults.h
index fc0ecb499594f06731abe87b29ab6df7f7f82ca0..381a48210d1b9895fbda4e4c89eb0e51fa61b6d0 100644
--- a/src/a64/frames-a64.cc
+++ b/include/v8-defaults.h
@@ -25,27 +25,30 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#include "v8.h"
-
-#if V8_TARGET_ARCH_A64
+#ifndef V8_V8_DEFAULTS_H_
+#define V8_V8_DEFAULTS_H_
 
-#include "assembler.h"
-#include "assembler-a64.h"
-#include "assembler-a64-inl.h"
-#include "frames.h"
+#include "v8.h"
 
+/**
+ * Default configuration support for the V8 JavaScript engine.
+ */
 namespace v8 {
-namespace internal {
-
-
-Register JavaScriptFrame::fp_register() { return v8::internal::fp; }
-Register JavaScriptFrame::context_register() { return cp; }
 
+/**
+ * Configures the constraints with reasonable default values based on the
+ * capabilities of the current device the VM is running on.
+ */
+bool V8_EXPORT ConfigureResourceConstraintsForCurrentPlatform(
+    ResourceConstraints* constraints);
 
-Register StubFailureTrampolineFrame::fp_register() { return v8::internal::fp; }
-Register StubFailureTrampolineFrame::context_register() { return cp; }
 
+/**
+ * Convience function which performs SetResourceConstraints with the settings
+ * returned by ConfigureResourceConstraintsForCurrentPlatform.
+ */
+bool V8_EXPORT SetDefaultResourceConstraintsForCurrentPlatform();
 
-} }  // namespace v8::internal
+}  // namespace v8
 
-#endif  // V8_TARGET_ARCH_A64
+#endif  // V8_V8_DEFAULTS_H_