Dart: Moves |native| methods to patch files.

mojo/public/dart/src/buffer.dart

Index: mojo/public/dart/src/buffer.dart
diff --git a/mojo/public/dart/src/buffer.dart b/mojo/public/dart/src/buffer.dart
index 44673157e5c5b34afa0c56ff42184add3ab9d821..a396dea8247c82ed7a24c75a83bc46cd192e2d65 100644
--- a/mojo/public/dart/src/buffer.dart
+++ b/mojo/public/dart/src/buffer.dart
@@ -5,21 +5,14 @@
 part of core;
 
 class _MojoSharedBufferNatives {
-  static List Create(int numBytes, int flags)
-      native "MojoSharedBuffer_Create";
+  external static List Create(int numBytes, int flags);
 
-  static List Duplicate(int bufferHandle, int flags)
-      native "MojoSharedBuffer_Duplicate";
+  external static List Duplicate(int bufferHandle, int flags);
 
-  static List Map(MojoSharedBuffer buffer,
-                  int bufferHandle,
-                  int offset,
-                  int numBytes,
-                  int flags)
-      native "MojoSharedBuffer_Map";
+  external static List Map(MojoSharedBuffer buffer, int bufferHandle,
+      int offset, int numBytes, int flags);
 
-  static int Unmap(ByteData buffer)
-      native "MojoSharedBuffer_Unmap";
+  external static int Unmap(ByteData buffer);
 }
 
 
@@ -32,8 +25,8 @@ class MojoSharedBuffer {
   MojoResult status;
   ByteData mapping;
 
-  MojoSharedBuffer(
-      this.handle, [this.status = MojoResult.OK, this.mapping = null]);
+  MojoSharedBuffer(this.handle, [this.status = MojoResult.OK, this.mapping =
+      null]);
 
   factory MojoSharedBuffer.create(int numBytes, [int flags = 0]) {
     List result = _MojoSharedBufferNatives.Create(numBytes, flags);
@@ -58,7 +51,7 @@ class MojoSharedBuffer {
     }
     assert((result is List) && (result.length == 2));
     var r = new MojoResult(result[0]);
-    if(!r.isOk) {
+    if (!r.isOk) {
       return null;
     }
 
@@ -83,8 +76,8 @@ class MojoSharedBuffer {
       status = MojoResult.INVALID_ARGUMENT;
       return status;
     }
-    List result = _MojoSharedBufferNatives.Map(
-        this, handle.h, offset, numBytes, flags);
+    List result =
+        _MojoSharedBufferNatives.Map(this, handle.h, offset, numBytes, flags);
     if (result == null) {
       status = MojoResult.INVALID_ARGUMENT;
       return status;