Add unittests target to the binary distribution (issue #1632)

- Move all tests from the top-level directory to tests/.
- Move files shared by cefclient and unittests to tests/shared/.
- Add a fused (single header/source file) version of gtest in
  tests/gtest/ with associated CMake configuration.
- Test-only headers are now exposed in include/test/. Unit test
  targets must define UNIT_TEST in order to access them.
- Replace usage of USING_CEF_SHARED with WRAPPING_CEF_SHARED for
  clarity (only the libcef_dll_wrapper target should define it).
- Remove the RENAME_DIRECTORY CMake macro which is no longer used.
- Remove C++11 usage from unittests sources for compatibility with
  the binary distribution configuration.
- Windows: Fix build errors due to chrome_elf.dll and imm32.lib
  missing from the CMake configuration.

tests/shared/browser/util_win.cc

@@ -0,0 +1,160 @@
+// Copyright (c) 2015 The Chromium Embedded Framework 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 "tests/shared/browser/util_win.h"
+
+#include "include/base/cef_logging.h"
+
+namespace client {
+
+void SetUserDataPtr(HWND hWnd, void* ptr) {
+  SetLastError(ERROR_SUCCESS);
+  LONG_PTR result = ::SetWindowLongPtr(
+      hWnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(ptr));
+  CHECK(result != 0 || GetLastError() == ERROR_SUCCESS);
+}
+
+WNDPROC SetWndProcPtr(HWND hWnd, WNDPROC wndProc) {
+  WNDPROC old =
+      reinterpret_cast<WNDPROC>(::GetWindowLongPtr(hWnd, GWLP_WNDPROC));
+  CHECK(old != NULL);
+  LONG_PTR result = ::SetWindowLongPtr(
+      hWnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(wndProc));
+  CHECK(result != 0 || GetLastError() == ERROR_SUCCESS);
+  return old;
+}
+
+std::wstring GetResourceString(UINT id) {
+  #define MAX_LOADSTRING 100
+  TCHAR buff[MAX_LOADSTRING] = {0};
+  LoadString(::GetModuleHandle(NULL), id, buff, MAX_LOADSTRING);
+  return buff;
+}
+
+int GetCefMouseModifiers(WPARAM wparam) {
+  int modifiers = 0;
+  if (wparam & MK_CONTROL)
+    modifiers |= EVENTFLAG_CONTROL_DOWN;
+  if (wparam & MK_SHIFT)
+    modifiers |= EVENTFLAG_SHIFT_DOWN;
+  if (IsKeyDown(VK_MENU))
+    modifiers |= EVENTFLAG_ALT_DOWN;
+  if (wparam & MK_LBUTTON)
+    modifiers |= EVENTFLAG_LEFT_MOUSE_BUTTON;
+  if (wparam & MK_MBUTTON)
+    modifiers |= EVENTFLAG_MIDDLE_MOUSE_BUTTON;
+  if (wparam & MK_RBUTTON)
+    modifiers |= EVENTFLAG_RIGHT_MOUSE_BUTTON;
+
+  // Low bit set from GetKeyState indicates "toggled".
+  if (::GetKeyState(VK_NUMLOCK) & 1)
+    modifiers |= EVENTFLAG_NUM_LOCK_ON;
+  if (::GetKeyState(VK_CAPITAL) & 1)
+    modifiers |= EVENTFLAG_CAPS_LOCK_ON;
+  return modifiers;
+}
+
+int GetCefKeyboardModifiers(WPARAM wparam, LPARAM lparam) {
+  int modifiers = 0;
+  if (IsKeyDown(VK_SHIFT))
+    modifiers |= EVENTFLAG_SHIFT_DOWN;
+  if (IsKeyDown(VK_CONTROL))
+    modifiers |= EVENTFLAG_CONTROL_DOWN;
+  if (IsKeyDown(VK_MENU))
+    modifiers |= EVENTFLAG_ALT_DOWN;
+
+  // Low bit set from GetKeyState indicates "toggled".
+  if (::GetKeyState(VK_NUMLOCK) & 1)
+    modifiers |= EVENTFLAG_NUM_LOCK_ON;
+  if (::GetKeyState(VK_CAPITAL) & 1)
+    modifiers |= EVENTFLAG_CAPS_LOCK_ON;
+
+  switch (wparam) {
+  case VK_RETURN:
+    if ((lparam >> 16) & KF_EXTENDED)
+      modifiers |= EVENTFLAG_IS_KEY_PAD;
+    break;
+  case VK_INSERT:
+  case VK_DELETE:
+  case VK_HOME:
+  case VK_END:
+  case VK_PRIOR:
+  case VK_NEXT:
+  case VK_UP:
+  case VK_DOWN:
+  case VK_LEFT:
+  case VK_RIGHT:
+    if (!((lparam >> 16) & KF_EXTENDED))
+      modifiers |= EVENTFLAG_IS_KEY_PAD;
+    break;
+  case VK_NUMLOCK:
+  case VK_NUMPAD0:
+  case VK_NUMPAD1:
+  case VK_NUMPAD2:
+  case VK_NUMPAD3:
+  case VK_NUMPAD4:
+  case VK_NUMPAD5:
+  case VK_NUMPAD6:
+  case VK_NUMPAD7:
+  case VK_NUMPAD8:
+  case VK_NUMPAD9:
+  case VK_DIVIDE:
+  case VK_MULTIPLY:
+  case VK_SUBTRACT:
+  case VK_ADD:
+  case VK_DECIMAL:
+  case VK_CLEAR:
+    modifiers |= EVENTFLAG_IS_KEY_PAD;
+    break;
+  case VK_SHIFT:
+    if (IsKeyDown(VK_LSHIFT))
+      modifiers |= EVENTFLAG_IS_LEFT;
+    else if (IsKeyDown(VK_RSHIFT))
+      modifiers |= EVENTFLAG_IS_RIGHT;
+    break;
+  case VK_CONTROL:
+    if (IsKeyDown(VK_LCONTROL))
+      modifiers |= EVENTFLAG_IS_LEFT;
+    else if (IsKeyDown(VK_RCONTROL))
+      modifiers |= EVENTFLAG_IS_RIGHT;
+    break;
+  case VK_MENU:
+    if (IsKeyDown(VK_LMENU))
+      modifiers |= EVENTFLAG_IS_LEFT;
+    else if (IsKeyDown(VK_RMENU))
+      modifiers |= EVENTFLAG_IS_RIGHT;
+    break;
+  case VK_LWIN:
+    modifiers |= EVENTFLAG_IS_LEFT;
+    break;
+  case VK_RWIN:
+    modifiers |= EVENTFLAG_IS_RIGHT;
+    break;
+  }
+  return modifiers;
+}
+
+bool IsKeyDown(WPARAM wparam) {
+  return (GetKeyState(wparam) & 0x8000) != 0;
+}
+
+float GetDeviceScaleFactor() {
+  static float scale_factor = 1.0;
+  static bool initialized = false;
+
+  if (!initialized) {
+    // This value is safe to cache for the life time of the app since the user
+    // must logout to change the DPI setting. This value also applies to all
+    // screens.
+    HDC screen_dc = ::GetDC(NULL);
+    int dpi_x = GetDeviceCaps(screen_dc, LOGPIXELSX);
+    scale_factor = static_cast<float>(dpi_x) / 96.0f;
+    ::ReleaseDC(NULL, screen_dc);
+    initialized = true;
+  }
+
+  return scale_factor;
+}
+
+}  // namespace client