Add IsInternal property to gfx::Display

ui/gfx/display.cc

 // Copyright (c) 2012 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 "ui/gfx/display.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
@@ skipping 14 matching lines @@
   double scale_in_double = 1.0;
   if (HasForceDeviceScaleFactorImpl()) {
     std::string value = CommandLine::ForCurrentProcess()->
         GetSwitchValueASCII(switches::kForceDeviceScaleFactor);
     if (!base::StringToDouble(value, &scale_in_double))
       LOG(ERROR) << "Failed to parse the default device scale factor:" << value;
   }
   return static_cast<float>(scale_in_double);
 }
 
-} // namespace
+const int64 kInvalidDisplayIDForCompileTimeInit = -1;
+int64 internal_display_id_ = kInvalidDisplayIDForCompileTimeInit;
+}  // namespace
 
-const int64 Display::kInvalidDisplayID = -1;
+const int64 Display::kInvalidDisplayID = kInvalidDisplayIDForCompileTimeInit;
 
 // static
 float Display::GetForcedDeviceScaleFactor() {
   static const float kForcedDeviceScaleFactor =
       GetForcedDeviceScaleFactorImpl();
   return kForcedDeviceScaleFactor;
 }
 
 //static
 bool Display::HasForceDeviceScaleFactor() {
@@ skipping 74 matching lines @@
 void Display::UpdateWorkAreaFromInsets(const gfx::Insets& insets) {
   work_area_ = bounds_;
   work_area_.Inset(insets);
 }
 
 gfx::Size Display::GetSizeInPixel() const {
   return gfx::ToFlooredSize(gfx::ScaleSize(size(), device_scale_factor_));
 }
 
 std::string Display::ToString() const {
-  return base::StringPrintf("Display[%lld] bounds=%s, workarea=%s, scale=%f",
-                            static_cast<long long int>(id_),
-                            bounds_.ToString().c_str(),
-                            work_area_.ToString().c_str(),
-                            device_scale_factor_);
+  return base::StringPrintf(
+      "Display[%lld] bounds=%s, workarea=%s, scale=%f, %s",
+      static_cast<long long int>(id_),
+      bounds_.ToString().c_str(),
+      work_area_.ToString().c_str(),
+      device_scale_factor_,
+      IsInternal() ? "internal" : "external");
+}
+
+bool Display::IsInternal() const {
+  return is_valid() && (id_ == internal_display_id_);
+}
+
+int64 Display::InternalDisplayId() {
+  return internal_display_id_;
+}
+
+void Display::SetInternalDisplayId(int64 internal_display_id) {
+  internal_display_id_ = internal_display_id;
 }
 
 }  // namespace gfx