Codechange: be consistent in naming the paint function Paint()

Also move this function to be a class member. This to allow
further deduplicating of code in a later commit.

src/video/cocoa/cocoa_v.h

@@ -75,6 +75,7 @@ protected:
 	Dimension GetScreenSize() const override;
 	float GetDPIScale() override;
 	void InputLoop() override;
+	void Paint() override;
 
 private:
 	bool PollEvent();
@@ -89,7 +90,6 @@ private:
 	void UpdatePalette(uint first_color, uint num_colors);
 	void CheckPaletteAnim();
 
-	void Draw(bool force_update = false);
 	void BlitIndexedToView32(int left, int top, int right, int bottom);
 };
 

src/video/cocoa/cocoa_v.mm

@@ -465,10 +465,10 @@ void VideoDriver_Cocoa::BlitIndexedToView32(int left, int top, int right, int bo
 }
 
 /**
- * Draw window.
+ * Paint window.
  * @param force_update Whether to redraw unconditionally
  */
-void VideoDriver_Cocoa::Draw(bool force_update)
+void VideoDriver_Cocoa::Paint()
 {
 	PerformanceMeasurer framerate(PFE_VIDEO);
 
@@ -502,9 +502,8 @@ void VideoDriver_Cocoa::Draw(bool force_update)
 		dirtyrect.size.height = this->dirty_rects[i].bottom - this->dirty_rects[i].top;
 
 		/* Normally drawRect will be automatically called by Mac OS X during next update cycle,
-		 * and then blitting will occur. If force_update is true, it will be done right now. */
+		 * and then blitting will occur. */
 		[ this->cocoaview setNeedsDisplayInRect:[ this->cocoaview getVirtualRect:dirtyrect ] ];
-		if (force_update) [ this->cocoaview displayIfNeeded ];
 	}
 
 	this->num_dirty_rects = 0;
@@ -708,7 +707,7 @@ void VideoDriver_Cocoa::GameLoop()
 				UpdateWindows();
 				this->CheckPaletteAnim();
 
-				this->Draw();
+				this->Paint();
 			}
 
 			/* If we are not in fast-forward, create some time between calls to ease up CPU usage. */