Reland "Move webrtc/{base => rtc_base}" (https://codereview.webrtc.org/2877023002)

Reland the base->rtc_base without adding stub headers (will be
done in follow-up CL). This preserves git blame history of all files.

BUG=webrtc:7634
NOTRY=True
TBR=kwiberg@webrtc.org

Change-Id: Iea3bb6f3f67b8374c96337b63e8f5aa3e6181012
Reviewed-on: https://chromium-review.googlesource.com/554611
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#18821}

webrtc/rtc_base/win32window.cc

@@ -0,0 +1,121 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/base/checks.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/base/win32window.h"
+
+namespace rtc {
+
+///////////////////////////////////////////////////////////////////////////////
+// Win32Window
+///////////////////////////////////////////////////////////////////////////////
+
+static const wchar_t kWindowBaseClassName[] = L"WindowBaseClass";
+HINSTANCE Win32Window::instance_ = nullptr;
+ATOM Win32Window::window_class_ = 0;
+
+Win32Window::Win32Window() : wnd_(nullptr) {}
+
+Win32Window::~Win32Window() {
+  RTC_DCHECK(nullptr == wnd_);
+}
+
+bool Win32Window::Create(HWND parent, const wchar_t* title, DWORD style,
+                         DWORD exstyle, int x, int y, int cx, int cy) {
+  if (wnd_) {
+    // Window already exists.
+    return false;
+  }
+
+  if (!window_class_) {
+    if (!GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
+                           GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+                           reinterpret_cast<LPCWSTR>(&Win32Window::WndProc),
+                           &instance_)) {
+      LOG_GLE(LS_ERROR) << "GetModuleHandleEx failed";
+      return false;
+    }
+
+    // Class not registered, register it.
+    WNDCLASSEX wcex;
+    memset(&wcex, 0, sizeof(wcex));
+    wcex.cbSize = sizeof(wcex);
+    wcex.hInstance = instance_;
+    wcex.lpfnWndProc = &Win32Window::WndProc;
+    wcex.lpszClassName = kWindowBaseClassName;
+    window_class_ = ::RegisterClassEx(&wcex);
+    if (!window_class_) {
+      LOG_GLE(LS_ERROR) << "RegisterClassEx failed";
+      return false;
+    }
+  }
+  wnd_ = ::CreateWindowEx(exstyle, kWindowBaseClassName, title, style, x, y, cx,
+                          cy, parent, nullptr, instance_, this);
+  return (nullptr != wnd_);
+}
+
+void Win32Window::Destroy() {
+  const bool success = ::DestroyWindow(wnd_);
+  RTC_DCHECK(success);
+}
+
+void Win32Window::Shutdown() {
+  if (window_class_) {
+    ::UnregisterClass(MAKEINTATOM(window_class_), instance_);
+    window_class_ = 0;
+  }
+}
+
+bool Win32Window::OnMessage(UINT uMsg, WPARAM wParam, LPARAM lParam,
+                            LRESULT& result) {
+  switch (uMsg) {
+  case WM_CLOSE:
+    if (!OnClose()) {
+      result = 0;
+      return true;
+    }
+    break;
+  }
+  return false;
+}
+
+LRESULT Win32Window::WndProc(HWND hwnd, UINT uMsg,
+                             WPARAM wParam, LPARAM lParam) {
+  Win32Window* that = reinterpret_cast<Win32Window*>(
+      ::GetWindowLongPtr(hwnd, GWLP_USERDATA));
+  if (!that && (WM_CREATE == uMsg)) {
+    CREATESTRUCT* cs = reinterpret_cast<CREATESTRUCT*>(lParam);
+    that = static_cast<Win32Window*>(cs->lpCreateParams);
+    that->wnd_ = hwnd;
+    ::SetWindowLongPtr(hwnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(that));
+  }
+  if (that) {
+    LRESULT result;
+    bool handled = that->OnMessage(uMsg, wParam, lParam, result);
+    if (WM_DESTROY == uMsg) {
+      for (HWND child = ::GetWindow(hwnd, GW_CHILD); child;
+           child = ::GetWindow(child, GW_HWNDNEXT)) {
+        LOG(LS_INFO) << "Child window: " << static_cast<void*>(child);
+      }
+    }
+    if (WM_NCDESTROY == uMsg) {
+      ::SetWindowLongPtr(hwnd, GWLP_USERDATA, NULL);
+      that->wnd_ = nullptr;
+      that->OnNcDestroy();
+    }
+    if (handled) {
+      return result;
+    }
+  }
+  return ::DefWindowProc(hwnd, uMsg, wParam, lParam);
+}
+
+}  // namespace rtc