Remove unused function Compositor::setDeviceScaleFactor.

BUG=

Review-Url: https://codereview.chromium.org/2608023002
Cr-Commit-Position: refs/heads/master@{#441312}

content/browser/renderer_host/compositor_impl_android.cc

@@ -324,7 +324,6 @@ CompositorImpl::CompositorImpl(CompositorClient* client,
     : frame_sink_id_(
           ui::ContextProviderFactory::GetInstance()->AllocateFrameSinkId()),
       resource_manager_(root_window),
-      device_scale_factor_(1),
       window_(NULL),
       surface_handle_(gpu::kNullSurfaceHandle),
       client_(client),
@@ -443,7 +442,7 @@ void CompositorImpl::CreateLayerTreeHost() {
   host_->SetFrameSinkId(frame_sink_id_);
   host_->GetLayerTree()->SetViewportSize(size_);
   SetHasTransparentBackground(false);
-  host_->GetLayerTree()->SetDeviceScaleFactor(device_scale_factor_);
+  host_->GetLayerTree()->SetDeviceScaleFactor(1);
 
   if (needs_animate_)
     host_->SetNeedsAnimate();
@@ -471,12 +470,6 @@ void CompositorImpl::SetVisible(bool visible) {
   }
 }
 
-void CompositorImpl::setDeviceScaleFactor(float factor) {
-  device_scale_factor_ = factor;
-  if (host_)
-    host_->GetLayerTree()->SetDeviceScaleFactor(factor);
-}
-
 void CompositorImpl::SetWindowBounds(const gfx::Size& size) {
   if (size_ == size)
     return;

content/browser/renderer_host/compositor_impl_android.h

@@ -67,7 +67,6 @@ class CONTENT_EXPORT CompositorImpl
   // Compositor implementation.
   void SetRootLayer(scoped_refptr<cc::Layer> root) override;
   void SetSurface(jobject surface) override;
-  void setDeviceScaleFactor(float factor) override;
   void SetWindowBounds(const gfx::Size& size) override;
   void SetHasTransparentBackground(bool flag) override;
   void SetNeedsComposite() override;
@@ -142,7 +141,6 @@ class CONTENT_EXPORT CompositorImpl
 
   gfx::Size size_;
   bool has_transparent_background_;
-  float device_scale_factor_;
 
   ANativeWindow* window_;
   gpu::SurfaceHandle surface_handle_;

content/public/browser/android/compositor.h

@@ -42,9 +42,6 @@ class CONTENT_EXPORT Compositor {
   // Attaches the layer tree.
   virtual void SetRootLayer(scoped_refptr<cc::Layer> root) = 0;
 
-  // Set the scale factor from DIP to pixel.
-  virtual void setDeviceScaleFactor(float factor) = 0;
-
   // Set the output surface bounds.
   virtual void SetWindowBounds(const gfx::Size& size) = 0;