Don't call WebCacheManager::Remove(RPH_id) to clear webview's cache.

chrome/browser/apps/guest_view/web_view_browsertest.cc

 // Copyright 2013 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.
 
 #include <queue>
 #include <set>
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/files/file_util.h"
@@ skipping 2250 matching lines @@
       NEEDS_TEST_SERVER);
 }
 
 IN_PROC_BROWSER_TEST_P(WebViewTest, ClearData) {
   ASSERT_TRUE(StartEmbeddedTestServer());  // For serving guest pages.
   ASSERT_TRUE(RunPlatformAppTestWithArg(
       "platform_apps/web_view/common", "cleardata"))
           << message_;
 }
 
+// Regression test for https://crbug.com/615429.
+IN_PROC_BROWSER_TEST_P(WebViewTest, ClearDataTwice) {
+  ASSERT_TRUE(StartEmbeddedTestServer());  // For serving guest pages.
+  ASSERT_TRUE(RunPlatformAppTestWithArg("platform_apps/web_view/common",
+                                        "cleardata_twice"))
+      << message_;
+}
+
 #if defined(OS_WIN)
 // Test is disabled on Windows because it fails often (~9% time)
 // http://crbug.com/489088
 #define MAYBE_ClearDataCache DISABLED_ClearDataCache
 #else
 #define MAYBE_ClearDataCache ClearDataCache
 #endif
 IN_PROC_BROWSER_TEST_P(WebViewTest, MAYBE_ClearDataCache) {
   TestHelper("testClearCache", "web_view/clear_data_cache", NEEDS_TEST_SERVER);
 }
@@ skipping 1222 matching lines @@
   gfx::Point embedder_origin =
       GetEmbedderWebContents()->GetContainerBounds().origin();
   guest_rect.Offset(-embedder_origin.x(), -embedder_origin.y());
 
   // Generate and send synthetic touch event.
   content::SimulateTouchPressAt(GetEmbedderWebContents(),
                                 guest_rect.CenterPoint());
   EXPECT_TRUE(aura_webview->HasFocus());
 }
 #endif