fix($http): fix and cleanup $http and friends

$http:
- use promises internally
- get rid of XhrFuture that was previously used internally
- get rid of $browser.defer calls for async stuff (serving from cache),
  promises will take care of asynchronicity
- fix transformation bugs (when caching requested + multiple request
  pending + error is returned)
- get rid of native header parsing and instead just lazily parse the
  header string

$httpBackend:
- don't return raw/mock XMLHttpRequest object (we don't use it for
  anything anymore)
- call the callback with response headers string

mock $httpBackend:
- unify response api for expect and when
- call the callback with response headers string
- changed the expect/when failure error message so that EXPECTED and GOT
  values are aligned

Conflicts:

	src/service/http.js
	test/service/compilerSpec.js
	test/service/httpSpec.js

1 files changed, 8 insertions, 15 deletions

diff --git a/test/service/httpBackendSpec.js b/test/service/httpBackendSpec.js
index b9bf2b18..1c6d3a51 100644
--- a/test/service/httpBackendSpec.js
+++ b/test/service/httpBackendSpec.js
@@ -58,18 +58,13 @@ describe('$httpBackend', function() {
     $backend('POST', 'URL', null, noop, {'X-header1': 'value1', 'X-header2': 'value2'});
     xhr = MockXhr.$$lastInstance;
 
-    expect(xhr.$$headers).toEqual({
+    expect(xhr.$$reqHeaders).toEqual({
       'X-header1': 'value1',
       'X-header2': 'value2'
     });
   });
 
 
-  it('should return raw xhr object', function() {
-    expect($backend('GET', '/url', null, noop)).toBe(MockXhr.$$lastInstance);
-  });
-
-
   it('should abort request on timeout', function() {
     callback.andCallFake(function(status, response) {
       expect(status).toBe(-1);
@@ -91,16 +86,20 @@ describe('$httpBackend', function() {
   });
 
 
-  it('should be async even if xhr.send() is sync', function() {
-    // IE6, IE7 is sync when serving from cache
+  it('should register onreadystatechange callback before sending', function() {
+    // send() in IE6, IE7 is sync when serving from cache
     function SyncXhr() {
       xhr = this;
       this.open = this.setRequestHeader = noop;
+
       this.send = function() {
         this.status = 200;
         this.responseText = 'response';
         this.readyState = 4;
+        this.onreadystatechange();
       };
+
+      this.getAllResponseHeaders = valueFn('');
     }
 
     callback.andCallFake(function(status, response) {
@@ -108,14 +107,8 @@ describe('$httpBackend', function() {
       expect(response).toBe('response');
     });
 
-    $backend = createHttpBackend($browser, SyncXhr, fakeTimeout);
+    $backend = createHttpBackend($browser, SyncXhr);
     $backend('GET', '/url', null, callback);
-    expect(callback).not.toHaveBeenCalled();
-
-    fakeTimeout.flush();
-    expect(callback).toHaveBeenCalledOnce();
-
-    (xhr.onreadystatechange || noop)();
     expect(callback).toHaveBeenCalledOnce();
   });