Change the error format with function name, now put function at front. Also...

Change the error format with function name, now put function at front. Also avoid multiple-line error message.

Bug: 1024606
Change-Id: I23f4db9cdec469eede696a1a5c730b072d6f786f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1971042
Commit-Queue: Jing Wang <jiwan@chromium.org>
Reviewed-by: Shu Chen <shuchen@chromium.org>
Reviewed-by: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727276}

chrome/browser/extensions/api/input_ime/input_ime_api.cc

@@ -463,7 +463,7 @@ InputImeEventRouter* GetInputImeEventRouter(Profile* profile) {
 
 std::string InformativeError(const std::string& error,
                              const char* function_name) {
-  return base::StringPrintf("%s\nThrown by %s", error.c_str(), function_name);
+  return base::StringPrintf("[%s]: %s", function_name, error.c_str());
 }
 
 }  // namespace extensions

chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js

@@ -2,8 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-var failToSendKeyEvents = `Could not send key events. ENTER et al. keys are allowed only on http:, https: etc.
-Thrown by input.ime.sendKeyEvents`;
+var failToSendKeyEvents = "[input.ime.sendKeyEvents]: Could not send key events. ENTER et al. keys are allowed only on http:, https: etc.";
 
 chrome.test.runTests([
   // Tests input.ime.activate and input.ime.onFocus APIs.