aura: Remove WindowTreeHost::OnDeviceScaleFactorChanged.

None of the implementations if WindowTreeHosts do anything when
the device-scale factor changes. So remove it.

BUG=none
R=sky@chromium.org

Review URL: https://codereview.chromium.org/389663003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282799 0039d316-1c4b-4281-b951-d872f2087c98

mojo/aura/window_tree_host_mojo.cc

@@ -137,11 +137,6 @@ void WindowTreeHostMojo::PostNativeEvent(
   NOTIMPLEMENTED();
 }
 
-void WindowTreeHostMojo::OnDeviceScaleFactorChanged(
-    float device_scale_factor) {
-  NOTIMPLEMENTED();
-}
-
 void WindowTreeHostMojo::SetCursorNative(gfx::NativeCursor cursor) {
   NOTIMPLEMENTED();
 }

mojo/aura/window_tree_host_mojo.h

@@ -53,7 +53,6 @@ class WindowTreeHostMojo : public aura::WindowTreeHost,
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void SetCursorNative(gfx::NativeCursor cursor) OVERRIDE;
   virtual void MoveCursorToNative(const gfx::Point& location) OVERRIDE;
   virtual void OnCursorVisibilityChangedNative(bool show) OVERRIDE;

mojo/services/view_manager/window_tree_host_impl.cc

@@ -144,10 +144,6 @@ void WindowTreeHostImpl::PostNativeEvent(
   NOTIMPLEMENTED();
 }
 
-void WindowTreeHostImpl::OnDeviceScaleFactorChanged(float device_scale_factor) {
-  NOTIMPLEMENTED();
-}
-
 void WindowTreeHostImpl::SetCursorNative(gfx::NativeCursor cursor) {
   NOTIMPLEMENTED();
 }

mojo/services/view_manager/window_tree_host_impl.h

@@ -46,7 +46,6 @@ class WindowTreeHostImpl : public aura::WindowTreeHost,
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void SetCursorNative(gfx::NativeCursor cursor) OVERRIDE;
   virtual void MoveCursorToNative(const gfx::Point& location) OVERRIDE;
   virtual void OnCursorVisibilityChangedNative(bool show) OVERRIDE;

ui/aura/remote_window_tree_host_win.cc

@@ -275,11 +275,6 @@ void RemoteWindowTreeHostWin::PostNativeEvent(
     const base::NativeEvent& native_event) {
 }
 
-void RemoteWindowTreeHostWin::OnDeviceScaleFactorChanged(
-    float device_scale_factor) {
-  NOTIMPLEMENTED();
-}
-
 ui::EventProcessor* RemoteWindowTreeHostWin::GetEventProcessor() {
   return dispatcher();
 }

ui/aura/remote_window_tree_host_win.h

@@ -126,7 +126,6 @@ class AURA_EXPORT RemoteWindowTreeHostWin
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void SetCursorNative(gfx::NativeCursor cursor) OVERRIDE;
   virtual void MoveCursorToNative(const gfx::Point& location) OVERRIDE;
   virtual void OnCursorVisibilityChangedNative(bool show) OVERRIDE;

ui/aura/window.cc

@@ -795,8 +795,6 @@ void* Window::GetNativeWindowProperty(const char* key) const {
 
 void Window::OnDeviceScaleFactorChanged(float device_scale_factor) {
   ScopedCursorHider hider(this);
-  if (IsRootWindow())
-    host_->OnDeviceScaleFactorChanged(device_scale_factor);
   if (delegate_)
     delegate_->OnDeviceScaleFactorChanged(device_scale_factor);
 }

ui/aura/window_tree_host.h

@@ -142,9 +142,6 @@ class AURA_EXPORT WindowTreeHost {
   // Posts |native_event| to the platform's event queue.
   virtual void PostNativeEvent(const base::NativeEvent& native_event) = 0;
 
-  // Called when the device scale factor of the root window has chagned.
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) = 0;
-
  protected:
   friend class TestScreen;  // TODO(beng): see if we can remove/consolidate.
 

ui/aura/window_tree_host_ozone.cc

@@ -81,11 +81,6 @@ void WindowTreeHostOzone::PostNativeEvent(
   NOTIMPLEMENTED();
 }
 
-void WindowTreeHostOzone::OnDeviceScaleFactorChanged(
-    float device_scale_factor) {
-  NOTIMPLEMENTED();
-}
-
 void WindowTreeHostOzone::SetCursorNative(gfx::NativeCursor cursor) {
   ui::CursorFactoryOzone::GetInstance()->SetCursor(GetAcceleratedWidget(),
                                                    cursor.platform());

ui/aura/window_tree_host_ozone.h

@@ -39,7 +39,6 @@ class AURA_EXPORT WindowTreeHostOzone : public WindowTreeHost,
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& event) OVERRIDE;
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void SetCursorNative(gfx::NativeCursor cursor_type) OVERRIDE;
   virtual void MoveCursorToNative(const gfx::Point& location) OVERRIDE;
   virtual void OnCursorVisibilityChangedNative(bool show) OVERRIDE;

ui/aura/window_tree_host_win.cc

@@ -149,11 +149,6 @@ void WindowTreeHostWin::PostNativeEvent(const base::NativeEvent& native_event) {
       hwnd(), native_event.message, native_event.wParam, native_event.lParam);
 }
 
-void WindowTreeHostWin::OnDeviceScaleFactorChanged(
-    float device_scale_factor) {
-  NOTIMPLEMENTED();
-}
-
 ui::EventProcessor* WindowTreeHostWin::GetEventProcessor() {
   return dispatcher();
 }

ui/aura/window_tree_host_win.h

@@ -33,7 +33,6 @@ class AURA_EXPORT WindowTreeHostWin : public WindowTreeHost,
   virtual void MoveCursorToNative(const gfx::Point& location) OVERRIDE;
   virtual void OnCursorVisibilityChangedNative(bool show) OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
 
   // ui::EventSource:
   virtual ui::EventProcessor* GetEventProcessor() OVERRIDE;

ui/aura/window_tree_host_x11.cc

@@ -606,10 +606,6 @@ void WindowTreeHostX11::PostNativeEvent(
   XFlush(xdisplay_);
 }
 
-void WindowTreeHostX11::OnDeviceScaleFactorChanged(
-    float device_scale_factor) {
-}
-
 void WindowTreeHostX11::SetCursorNative(gfx::NativeCursor cursor) {
   if (cursor == current_cursor_)
     return;

ui/aura/window_tree_host_x11.h

@@ -52,7 +52,6 @@ class AURA_EXPORT WindowTreeHostX11 : public WindowTreeHost,
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& event) OVERRIDE;
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void SetCursorNative(gfx::NativeCursor cursor_type) OVERRIDE;
   virtual void MoveCursorToNative(const gfx::Point& location) OVERRIDE;
   virtual void OnCursorVisibilityChangedNative(bool show) OVERRIDE;

ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc

@@ -505,10 +505,6 @@ void DesktopWindowTreeHostWin::PostNativeEvent(
     const base::NativeEvent& native_event) {
 }
 
-void DesktopWindowTreeHostWin::OnDeviceScaleFactorChanged(
-    float device_scale_factor) {
-}
-
 void DesktopWindowTreeHostWin::SetCursorNative(gfx::NativeCursor cursor) {
   ui::CursorLoaderWin cursor_loader;
   cursor_loader.SetPlatformCursor(&cursor);

ui/views/widget/desktop_aura/desktop_window_tree_host_win.h

@@ -115,7 +115,6 @@ class VIEWS_EXPORT DesktopWindowTreeHostWin
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void SetCursorNative(gfx::NativeCursor cursor) OVERRIDE;
   virtual void OnCursorVisibilityChangedNative(bool show) OVERRIDE;
   virtual void MoveCursorToNative(const gfx::Point& location) OVERRIDE;

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc

@@ -968,10 +968,6 @@ void DesktopWindowTreeHostX11::PostNativeEvent(
   XSendEvent(xdisplay_, xwindow_, False, 0, &xevent);
 }
 
-void DesktopWindowTreeHostX11::OnDeviceScaleFactorChanged(
-    float device_scale_factor) {
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopWindowTreeHostX11, ui::EventSource implementation:
 

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h

@@ -156,7 +156,6 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void SetCursorNative(gfx::NativeCursor cursor) OVERRIDE;
   virtual void MoveCursorToNative(const gfx::Point& location) OVERRIDE;
   virtual void OnCursorVisibilityChangedNative(bool show) OVERRIDE;