Fix dictionary look-up for highlighted text in Mac.

content/public/test/text_input_test_utils_mac.mm

+// Copyright 2016 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 "content/public/test/text_input_test_utils.h"
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/memory/ref_counted.h"
+#include "base/strings/sys_string_conversions.h"
+#include "content/browser/renderer_host/render_widget_host_view_mac.h"
+#include "content/browser/site_instance_impl.h"
+#include "content/common/mac/attributed_string_coder.h"
+#include "content/common/text_input_client_messages.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/test/test_utils.h"
+#include "ipc/ipc_message_macros.h"
+
+namespace content {
+
+TestTextInputClientMessageFilter::TestTextInputClientMessageFilter(
+    RenderProcessHost* host)
+    : BrowserMessageFilter(TextInputClientMsgStart),
+      host_(host),
+      received_string_from_range_(false) {
+  host->AddFilter(this);
+}
+
+TestTextInputClientMessageFilter::~TestTextInputClientMessageFilter() {}
+
+void TestTextInputClientMessageFilter::WaitForStringFromRange() {
+  if (received_string_from_range_)
+    return;
+  message_loop_runner_ = new MessageLoopRunner();
+  message_loop_runner_->Run();
+}
+
+bool TestTextInputClientMessageFilter::OnMessageReceived(
+    const IPC::Message& message) {
+  if (message.type() == TextInputClientReplyMsg_GotStringForRange::ID) {
+    received_string_from_range_ = true;
+
+    // Now decode the string to get the word.
+    TextInputClientReplyMsg_GotStringForRange::Param params;
+    TextInputClientReplyMsg_GotStringForRange::Read(&message, &params);
+    const mac::AttributedStringCoder::EncodedString& encoded_string =
+        std::get<0>(params);
+    NSAttributedString* decoded =
+        mac::AttributedStringCoder::Decode(&encoded_string);
+    string_from_range_ = base::SysNSStringToUTF8([decoded string]);
+
+    // Stop the message loop if it is running.
+    if (message_loop_runner_) {
+      BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
+                              message_loop_runner_->QuitClosure());
+    }
+  }
+
+  // unhandled - leave it for the actual TextInputClientMessageFilter to handle.
+  return false;
+}
+
+void AskForLookUpDictionaryForRange(RenderWidgetHostView* tab_view,
+                                    const gfx::Range& range) {
+  RenderWidgetHostViewCocoa* cocoa_view =
+      static_cast<RenderWidgetHostViewMac*>(tab_view)->cocoa_view();
+
+  // Explicitly ask for the dictionary for the given range.
+  [cocoa_view showLookUpDictionaryOverlayFromRange:range.ToNSRange()
+                                        targetView:cocoa_view];
+}
+
+size_t GetOpenNSWindowsCount() {
+  return [[NSApp windows] count];
+}
+
+}  // namespace content