Fix compilation warnings/errors seen with newer versions of gcc compiler.

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
@@ skipping 17 matching lines @@
 namespace dart {
 
 // TODO(iposva): This is a placeholder for the eventual external Dart API.
 DART_EXPORT bool Dart_Initialize(int argc,
                                  char** argv,
                                  Dart_IsolateInitCallback callback) {
   return Dart::InitOnce(argc, argv, callback);
 }
 
 
-DART_EXPORT Dart_Isolate Dart_CreateIsolate(void* snapshot, void* data) {
+DART_EXPORT Dart_Isolate Dart_CreateIsolate(const Dart_Snapshot* snapshot,
+                                            void* data) {
   ASSERT(Isolate::Current() == NULL);
   Isolate* isolate = Dart::CreateIsolate(snapshot, data);
   START_TIMER(time_total_runtime);
   return reinterpret_cast<Dart_Isolate>(isolate);
 }
 
 
 DART_EXPORT void Dart_ShutdownIsolate() {
   ASSERT(Isolate::Current() != NULL);
   STOP_TIMER(time_total_runtime);
@@ skipping 1425 matching lines @@
   RETURN_CBOOLEAN(true);
 }
 
 
 static uint8_t* allocator(uint8_t* ptr, intptr_t old_size, intptr_t new_size) {
   void* new_ptr = realloc(reinterpret_cast<void*>(ptr), new_size);
   return reinterpret_cast<uint8_t*>(new_ptr);
 }
 
 
-DART_EXPORT Dart_Result Dart_PostIntArray(Dart_Port port, intptr_t field_count,
+DART_EXPORT Dart_Result Dart_PostIntArray(Dart_Port port,
+                                          int field_count,
                                           intptr_t* data) {
   uint8_t* buffer = NULL;
   MessageWriter writer(&buffer, &allocator);
 
   writer.WriteMessage(field_count, data);
 
   // Post the message at the given port. The allocated message and
   // buffer are deallocated after the message is processed.
   PortMessage* portMessage = new PortMessage(port, 0, buffer);
   bool result = PortMap::PostMessage(portMessage);
@@ skipping 111 matching lines @@
   ASSERT(isolate != NULL);
   ApiState* state = isolate->api_state();
   ASSERT(state != NULL);
   ApiLocalScope* scope = state->top_scope();
   ASSERT(scope != NULL);
   return scope->zone().Reallocate(ptr, old_size, new_size);
 }
 
 
 }  // namespace dart