Implement Linux IME support

mojo/dart/packages/mojo_services/lib/mojo/native_viewport.mojom.dart

Index: mojo/dart/packages/mojo_services/lib/mojo/native_viewport.mojom.dart
diff --git a/mojo/dart/packages/mojo_services/lib/mojo/native_viewport.mojom.dart b/mojo/dart/packages/mojo_services/lib/mojo/native_viewport.mojom.dart
index 69d6b76bc07b454e4966a9d469b9742754332112..c1dc9ab12b1ba88ab2abc3fe7d7c6ec1ed1321a2 100644
--- a/mojo/dart/packages/mojo_services/lib/mojo/native_viewport.mojom.dart
+++ b/mojo/dart/packages/mojo_services/lib/mojo/native_viewport.mojom.dart
@@ -657,6 +657,72 @@ class NativeViewportSetEventDispatcherParams extends bindings.Struct {
 }
 
 
+class NativeViewportSetKeyEventDispatcherParams extends bindings.Struct {
+  static const List<bindings.StructDataHeader> kVersions = const [
+    const bindings.StructDataHeader(16, 0)
+  ];
+  Object dispatcher = null;
+
+  NativeViewportSetKeyEventDispatcherParams() : super(kVersions.last.size);
+
+  static NativeViewportSetKeyEventDispatcherParams deserialize(bindings.Message message) {
+    var decoder = new bindings.Decoder(message);
+    var result = decode(decoder);
+    if (decoder.excessHandles != null) {
+      decoder.excessHandles.forEach((h) => h.close());
+    }
+    return result;
+  }
+
+  static NativeViewportSetKeyEventDispatcherParams decode(bindings.Decoder decoder0) {
+    if (decoder0 == null) {
+      return null;
+    }
+    NativeViewportSetKeyEventDispatcherParams result = new NativeViewportSetKeyEventDispatcherParams();
+
+    var mainDataHeader = decoder0.decodeStructDataHeader();
+    if (mainDataHeader.version <= kVersions.last.version) {
+      // Scan in reverse order to optimize for more recent versions.
+      for (int i = kVersions.length - 1; i >= 0; --i) {
+        if (mainDataHeader.version >= kVersions[i].version) {
+          if (mainDataHeader.size == kVersions[i].size) {
+            // Found a match.
+            break;
+          }
+          throw new bindings.MojoCodecError(
+              'Header size doesn\'t correspond to known version size.');
+        }
+      }
+    } else if (mainDataHeader.size < kVersions.last.size) {
+      throw new bindings.MojoCodecError(
+        'Message newer than the last known version cannot be shorter than '
+        'required by the last known version.');
+    }
+    if (mainDataHeader.version >= 0) {
+      
+      result.dispatcher = decoder0.decodeServiceInterface(8, false, NativeViewportEventDispatcherProxy.newFromEndpoint);
+    }
+    return result;
+  }
+
+  void encode(bindings.Encoder encoder) {
+    var encoder0 = encoder.getStructEncoderAtOffset(kVersions.last);
+    
+    encoder0.encodeInterface(dispatcher, 8, false);
+  }
+
+  String toString() {
+    return "NativeViewportSetKeyEventDispatcherParams("
+           "dispatcher: $dispatcher" ")";
+  }
+
+  Map toJson() {
+    throw new bindings.MojoCodecError(
+        'Object containing handles cannot be encoded to JSON.');
+  }
+}
+
+
 class NativeViewportGetContextProviderParams extends bindings.Struct {
   static const List<bindings.StructDataHeader> kVersions = const [
     const bindings.StructDataHeader(16, 0)
@@ -980,8 +1046,9 @@ const int kNativeViewport_hide_name = 2;
 const int kNativeViewport_close_name = 3;
 const int kNativeViewport_setSize_name = 4;
 const int kNativeViewport_setEventDispatcher_name = 5;
-const int kNativeViewport_getContextProvider_name = 6;
-const int kNativeViewport_requestMetrics_name = 7;
+const int kNativeViewport_setKeyEventDispatcher_name = 6;
+const int kNativeViewport_getContextProvider_name = 7;
+const int kNativeViewport_requestMetrics_name = 8;
 
 const String NativeViewportName =
       'mojo::NativeViewport';
@@ -993,6 +1060,7 @@ abstract class NativeViewport {
   void close();
   void setSize(geometry_mojom.Size size);
   void setEventDispatcher(Object dispatcher);
+  void setKeyEventDispatcher(Object dispatcher);
   void getContextProvider(Object provider);
   dynamic requestMetrics([Function responseFactory = null]);
 
@@ -1133,6 +1201,16 @@ class _NativeViewportProxyCalls implements NativeViewport {
       _proxyImpl.sendMessage(params, kNativeViewport_setEventDispatcher_name);
     }
   
+    void setKeyEventDispatcher(Object dispatcher) {
+      if (!_proxyImpl.isBound) {
+        _proxyImpl.proxyError("The Proxy is closed.");
+        return;
+      }
+      var params = new NativeViewportSetKeyEventDispatcherParams();
+      params.dispatcher = dispatcher;
+      _proxyImpl.sendMessage(params, kNativeViewport_setKeyEventDispatcher_name);
+    }
+  
     void getContextProvider(Object provider) {
       if (!_proxyImpl.isBound) {
         _proxyImpl.proxyError("The Proxy is closed.");
@@ -1299,6 +1377,11 @@ class NativeViewportStub extends bindings.Stub {
             message.payload);
         _impl.setEventDispatcher(params.dispatcher);
         break;
+      case kNativeViewport_setKeyEventDispatcher_name:
+        var params = NativeViewportSetKeyEventDispatcherParams.deserialize(
+            message.payload);
+        _impl.setKeyEventDispatcher(params.dispatcher);
+        break;
       case kNativeViewport_getContextProvider_name:
         var params = NativeViewportGetContextProviderParams.deserialize(
             message.payload);