Suppress the exception thrown when responding to message with no response callback.

chrome/browser/extensions/hotword_browsertest.cc

+// Copyright 2014 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 "base/files/file_path.h"
+#include "base/path_service.h"
+#include "base/prefs/pref_service.h"
+#include "chrome/browser/extensions/component_loader.h"
+#include "chrome/browser/extensions/error_console/error_console.h"
+#include "chrome/browser/extensions/extension_browsertest.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/test/base/ui_test_utils.h"
+#include "content/public/common/content_switches.h"
+#include "extensions/common/extension.h"
+#include "extensions/test/extension_test_message_listener.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+
+namespace extensions {
+
+static const char* kHotwordHelperExtensionId =
+    "dnhpdliibojhegemfjheidglijccjfmc";
+
+class HotwordBrowserTest : public ExtensionBrowserTest {
+ public:
+  HotwordBrowserTest() : error_console_(NULL) { }
+  virtual ~HotwordBrowserTest() { }
+
+ protected:
+  virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
+    ExtensionBrowserTest::SetUpInProcessBrowserTestFixture();
+
+    // Force the VoiceTrigger field trial on to enable the hotword_helper
+    // extension.
+    base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
+        switches::kForceFieldTrials, "VoiceTrigger/Install/");
+    // Load the hotword_helper extension.
+    ComponentLoader::EnableBackgroundExtensionsForTesting();
+
+    // We need to enable the ErrorConsole FeatureSwitch in order to collect
+    // errors. This should be enabled on any channel <= Dev, but let's make
+    // sure (in case a test is running on, e.g., a beta channel).
+    FeatureSwitch::error_console()->SetOverrideValue(
+        FeatureSwitch::OVERRIDE_ENABLED);
+  }
+
+  virtual void SetUpOnMainThread() OVERRIDE {
+    ExtensionBrowserTest::SetUpOnMainThread();
+
+    // Errors are only kept if we have Developer Mode enabled.
+    profile()->GetPrefs()->SetBoolean(prefs::kExtensionsUIDeveloperMode, true);
+
+    error_console_ = ErrorConsole::Get(profile());
+    ASSERT_TRUE(error_console_);
+  }
+
+  ErrorConsole* error_console() { return error_console_; }
+
+ private:
+  // Weak reference to the ErrorConsole.
+  ErrorConsole* error_console_;
+
+  DISALLOW_COPY_AND_ASSIGN(HotwordBrowserTest);
+};
+
+// Test we silently capture an exception from a message handler's response
+// callback. This happens when the caller to chrome.runtime.sendMessage()
+// doesn't specify a response callback.
+IN_PROC_BROWSER_TEST_F(HotwordBrowserTest, MessageSendResponseError) {
+  // Enable error reporting for the hotword helper extension.
+  error_console()->SetReportingAllForExtension(kHotwordHelperExtensionId, true);
+
+  ExtensionTestMessageListener doneListener("done", false);
+  const Extension* extension = extension_service()->GetExtensionById(
+      kHotwordHelperExtensionId, false);
+  ASSERT_TRUE(extension);
+  const Extension* test_extension = LoadExtension(
+      test_data_dir_.AppendASCII("hotword"));
+  ASSERT_TRUE(test_extension);
+
+  ASSERT_TRUE(doneListener.WaitUntilSatisfied());
+  ASSERT_TRUE(error_console()->GetErrorsForExtension(extension->id()).empty());
+}
+
+}  // namespace extensions