fix(input): do not hold input for composition on android

Workaround for chrome for android until #2129 is ready.

Closes #5308, #5323

Author: clkao

src/ng/directive/input.js

@@ -395,15 +395,17 @@ function textInputType(scope, element, attr, ctrl, $sniffer, $browser) {
   // In composition mode, users are still inputing intermediate text buffer,
   // hold the listener until composition is done.
   // More about composition events: https://developer.mozilla.org/en-US/docs/Web/API/CompositionEvent
-  var composing = false;
+  if (!$sniffer.android) {
+    var composing = false;
 
-  element.on('compositionstart', function() {
-    composing = true;
-  });
+    element.on('compositionstart', function(data) {
+      composing = true;
+    });
 
-  element.on('compositionend', function() {
-    composing = false;
-  });
+    element.on('compositionend', function() {
+      composing = false;
+    });
+  }
 
   var listener = function() {
     if (composing) return;

test/ng/directive/inputSpec.js

@@ -477,19 +477,37 @@ describe('input', function() {
     expect(scope.name).toEqual('adam');
   });
 
-  it('should not update the model between "compositionstart" and "compositionend"', function() {
-    compileInput('<input type="text" ng-model="name" name="alias"" />');
-    changeInputValueTo('a');
-    expect(scope.name).toEqual('a');
-    if (!(msie < 9)) {
-      browserTrigger(inputElm, 'compositionstart');
-      changeInputValueTo('adam');
-      expect(scope.name).toEqual('a');
-      browserTrigger(inputElm, 'compositionend');
-    }
-    changeInputValueTo('adam');
-    expect(scope.name).toEqual('adam');
-  });
+  if (!(msie < 9)) {
+    describe('compositionevents', function() {
+      it('should not update the model between "compositionstart" and "compositionend" on non android', inject(function($sniffer) {
+        $sniffer.android = false;
+
+        compileInput('<input type="text" ng-model="name" name="alias"" />');
+        changeInputValueTo('a');
+        expect(scope.name).toEqual('a');
+        browserTrigger(inputElm, 'compositionstart');
+        changeInputValueTo('adam');
+        expect(scope.name).toEqual('a');
+        browserTrigger(inputElm, 'compositionend');
+        changeInputValueTo('adam');
+        expect(scope.name).toEqual('adam');
+      }));
+
+      it('should update the model between "compositionstart" and "compositionend" on android', inject(function($sniffer) {
+        $sniffer.android = true;
+
+        compileInput('<input type="text" ng-model="name" name="alias"" />');
+        changeInputValueTo('a');
+        expect(scope.name).toEqual('a');
+        browserTrigger(inputElm, 'compositionstart');
+        changeInputValueTo('adam');
+        expect(scope.name).toEqual('adam');
+        browserTrigger(inputElm, 'compositionend');
+        changeInputValueTo('adam2');
+        expect(scope.name).toEqual('adam2');
+      }));
+    });
+  }
 
   describe('"change" event', function() {
     function assertBrowserSupportsChangeEvent(inputEventSupported) {