Upstream Chrome on iOS source code [4/11].

ios/chrome/browser/ui/chrome_web_view_factory.mm

Index: ios/chrome/browser/ui/chrome_web_view_factory.mm
diff --git a/ios/chrome/browser/ui/chrome_web_view_factory.mm b/ios/chrome/browser/ui/chrome_web_view_factory.mm
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+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "ios/chrome/browser/ui/chrome_web_view_factory.h"
+
+#include "base/base64.h"
+#include "base/logging.h"
+#include "base/mac/scoped_nsobject.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/web/net/request_group_util.h"
+#include "ios/web/net/request_tracker_impl.h"
+#include "ios/web/public/web_thread.h"
+#include "net/cookies/cookie_store.h"
+#include "net/url_request/url_request_context.h"
+#include "net/url_request/url_request_context_getter.h"
+
+NSString* const kExternalUserAgent = @"UIWebViewForExternalContent";
+
+namespace ChromeWebView {
+// Shared desktop user agent used to mimic Safari on a mac.
+NSString* const kDesktopUserAgent =
+    @"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_4) "
+    @"AppleWebKit/600.7.12 (KHTML, like Gecko) "
+    @"Version/8.0.7 "
+    @"Safari/600.7.12";
+
+NSString* const kExternalRequestGroupID = @"kExternalRequestGroupID";
+
+// Returns an absolute path where sharing service data is stored (such as
+// cookies and server-bound certificates).
+const base::FilePath GetExternalServicePath(
+    ios::ChromeBrowserState* browser_state,
+    IOSWebViewFactoryExternalService service) {
+  const base::FilePath path =
+      browser_state->GetOriginalChromeBrowserState()->GetStatePath();
+  switch (service) {
+    case SSO_AUTHENTICATION:
+      return path.Append("SSOAuthentication");
+    case NUM_SHARING_SERVICES:
+      NOTREACHED();
+      return path.Append("ExternalUnknownService");
+  }
+}
+}  // namespace ChromeWebView
+
+namespace {
+ios::ChromeBrowserState* g_external_browser_state = nullptr;
+scoped_refptr<web::RequestTrackerImpl> g_request_tracker;
+
+// Empty callback used by ClearCookiesOnIOThread below.
+void DoNothing(int n) {}
+
+// Clears the cookies.
+void ClearCookiesOnIOThread(net::URLRequestContextGetter* context_getter,
+                            base::Time delete_begin,
+                            base::Time delete_end) {
+  DCHECK(context_getter);
+  DCHECK_CURRENTLY_ON(web::WebThread::IO);
+  net::CookieStore* cookie_store =
+      context_getter->GetURLRequestContext()->cookie_store();
+  cookie_store->DeleteAllCreatedBetweenAsync(delete_begin, delete_end,
+                                             base::Bind(&DoNothing));
+}
+
+// Registers |user_agent| as the user agent string to be used by the UIWebView
+// instances that are created from now on.
+void RegisterUserAgentForUIWebView(NSString* user_agent) {
+  [[NSUserDefaults standardUserDefaults] registerDefaults:@{
+    @"UserAgent" : user_agent,
+  }];
+}
+
+}  // namespace
+
+@implementation ChromeWebViewFactory
+
++ (void)setBrowserStateToUseForExternal:(ios::ChromeBrowserState*)browserState {
+  g_external_browser_state = browserState;
+}
+
++ (void)externalSessionFinished {
+  g_external_browser_state = nullptr;
+  if (g_request_tracker.get())
+    g_request_tracker->Close();
+  g_request_tracker = nullptr;
+}
+
++ (net::URLRequestContextGetter*)requestContextForExternalService:
+    (IOSWebViewFactoryExternalService)externalService {
+  DCHECK(g_external_browser_state);
+  const base::FilePath servicePath =
+      [ChromeWebViewFactory partitionPathForExternalService:externalService];
+  return g_external_browser_state->CreateIsolatedRequestContext(servicePath);
+}
+
++ (base::FilePath)partitionPathForExternalService:
+    (IOSWebViewFactoryExternalService)externalService {
+  return ChromeWebView::GetExternalServicePath(g_external_browser_state,
+                                               externalService);
+}
+
++ (ChromeBrowserStateIOData*)ioDataForExternalWebViews {
+  DCHECK(g_external_browser_state);
+  return g_external_browser_state->GetIOData();
+}
+
++ (void)clearExternalCookies:(IOSWebViewFactoryExternalService)externalService
+                browserState:(ios::ChromeBrowserState*)browserState
+                    fromTime:(base::Time)deleteBegin
+                      toTime:(base::Time)deleteEnd {
+  const base::FilePath servicePath =
+      ChromeWebView::GetExternalServicePath(browserState, externalService);
+  scoped_refptr<net::URLRequestContextGetter> contextGetter =
+      browserState->CreateIsolatedRequestContext(servicePath);
+  [self clearCookiesForContextGetter:contextGetter
+                            fromTime:deleteBegin
+                              toTime:deleteEnd];
+}
+
++ (void)clearCookiesForContextGetter:
+            (scoped_refptr<net::URLRequestContextGetter>)contextGetter
+                            fromTime:(base::Time)deleteBegin
+                              toTime:(base::Time)deleteEnd {
+  DCHECK(contextGetter.get());
+  web::WebThread::PostTask(
+      web::WebThread::IO, FROM_HERE,
+      base::Bind(&ClearCookiesOnIOThread, base::RetainedRef(contextGetter),
+                 deleteBegin, deleteEnd));
+}
+
++ (void)clearExternalCookies:(ios::ChromeBrowserState*)browserState
+                    fromTime:(base::Time)deleteBegin
+                      toTime:(base::Time)deleteEnd {
+  for (unsigned int i = 0; i < NUM_SHARING_SERVICES; ++i) {
+    [ChromeWebViewFactory
+        clearExternalCookies:static_cast<IOSWebViewFactoryExternalService>(i)
+                browserState:browserState
+                    fromTime:deleteBegin
+                      toTime:deleteEnd];
+  }
+}
+
+#pragma mark -
+#pragma mark ChromeWebViewFactory
++ (UIWebView*)newExternalWebView:
+    (IOSWebViewFactoryExternalService)externalService {
+  // All UIWebView's created for sharing share the same user agent, as there is
+  // no need for them to be differentiated and this choice ensures that only
+  // one request tracker is created on a per-sharing-session basis.
+  NSString* userAgent = web::AddRequestGroupIDToUserAgent(
+      kExternalUserAgent, ChromeWebView::kExternalRequestGroupID);
+  RegisterUserAgentForUIWebView(userAgent);
+  if (!g_request_tracker.get()) {
+    DCHECK(g_external_browser_state);
+    g_request_tracker = web::RequestTrackerImpl::CreateTrackerForRequestGroupID(
+        ChromeWebView::kExternalRequestGroupID, g_external_browser_state,
+        [self requestContextForExternalService:externalService], nil);
+  }
+  return [[UIWebView alloc] initWithFrame:CGRectZero];
+}
+
+@end