Add OnDisplayMetricsChanged in DisplayObserver.

ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc

Index: ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
diff --git a/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc b/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
index 8a48ad13f95a6e7867d0de0c2b396a9ef6beaafa..c0f5d2fd6e854635a8567917a1c005c9e280a10c 100644
--- a/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
+++ b/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
@@ -176,10 +176,6 @@ class DesktopScreenX11Test : public views::ViewsTestBase,
 
  private:
   // Overridden from gfx::DisplayObserver:
-  virtual void OnDisplayBoundsChanged(const gfx::Display& display) OVERRIDE {
-    changed_display_.push_back(display);
-  }
-
   virtual void OnDisplayAdded(const gfx::Display& new_display) OVERRIDE {
     added_display_.push_back(new_display);
   }
@@ -188,6 +184,11 @@ class DesktopScreenX11Test : public views::ViewsTestBase,
     removed_display_.push_back(old_display);
   }
 
+  virtual void OnDisplayMetricsChanged(const gfx::Display& display,
+                                       uint32_t metrics) OVERRIDE {
+    changed_display_.push_back(display);
+  }
+
   scoped_ptr<DesktopScreenX11> screen_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopScreenX11Test);
@@ -455,4 +456,97 @@ TEST_F(DesktopScreenX11Test, RightClickDuringDoubleClickDoesntMaximize) {
   widget->CloseNow();
 }
 
+// Test that rotating the displays notifies the DisplayObservers.
+TEST_F(DesktopScreenX11Test, RotationChange) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  displays.push_back(
+      gfx::Display(kSecondDisplay, gfx::Rect(640, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+  ResetDisplayChanges();
+
+  displays[0].set_rotation(gfx::Display::ROTATE_90);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(1u, changed_display_.size());
+
+  displays[1].set_rotation(gfx::Display::ROTATE_90);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(2u, changed_display_.size());
+
+  displays[0].set_rotation(gfx::Display::ROTATE_270);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(3u, changed_display_.size());
+
+  displays[0].set_rotation(gfx::Display::ROTATE_270);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(3u, changed_display_.size());
+
+  displays[0].set_rotation(gfx::Display::ROTATE_0);
+  displays[1].set_rotation(gfx::Display::ROTATE_0);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(5u, changed_display_.size());
+}
+
+// Test that changing the displays workarea notifies the DisplayObservers.
+TEST_F(DesktopScreenX11Test, WorkareaChange) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  displays.push_back(
+      gfx::Display(kSecondDisplay, gfx::Rect(640, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+  ResetDisplayChanges();
+
+  displays[0].set_work_area(gfx::Rect(0, 0, 300, 300));
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(1u, changed_display_.size());
+
+  displays[1].set_work_area(gfx::Rect(0, 0, 300, 300));
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(2u, changed_display_.size());
+
+  displays[0].set_work_area(gfx::Rect(0, 0, 300, 300));
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(2u, changed_display_.size());
+
+  displays[1].set_work_area(gfx::Rect(0, 0, 300, 300));
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(2u, changed_display_.size());
+
+  displays[0].set_work_area(gfx::Rect(0, 0, 640, 480));
+  displays[1].set_work_area(gfx::Rect(640, 0, 1024, 768));
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(4u, changed_display_.size());
+}
+
+// Test that changing the device scale factor notifies the DisplayObservers.
+TEST_F(DesktopScreenX11Test, DeviceScaleFactorChange) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  displays.push_back(
+      gfx::Display(kSecondDisplay, gfx::Rect(640, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+  ResetDisplayChanges();
+
+  displays[0].set_device_scale_factor(2.5f);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(1u, changed_display_.size());
+
+  displays[1].set_device_scale_factor(2.5f);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(2u, changed_display_.size());
+
+  displays[0].set_device_scale_factor(2.5f);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(2u, changed_display_.size());
+
+  displays[1].set_device_scale_factor(2.5f);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(2u, changed_display_.size());
+
+  displays[0].set_device_scale_factor(1.f);
+  displays[1].set_device_scale_factor(1.f);
+  screen()->ProcessDisplayChange(displays);
+  EXPECT_EQ(4u, changed_display_.size());
+}
+
 }  // namespace views