Backout 273cb783edac (bug 627628) for causing bug 635465. a=backout

widget/src/windows/nsWindow.cpp

@@ -3945,12 +3945,9 @@ void nsWindow::DispatchPendingEvents()
     --recursionBlocker;
   }
 
-  // Quickly check to see if there are any paint events pending,
-  // but only dispatch them if it has been long enough since the
-  // last paint completed.
-  if (::GetQueueStatus(QS_PAINT) && 
-      (mLastPaintEndTime.IsNull() ||
-       (TimeStamp::Now() - mLastPaintEndTime).ToMilliseconds() >= 50)) {
+  // Quickly check to see if there are any
+  // paint events pending.
+  if (::GetQueueStatus(QS_PAINT)) {
     // Find the top level window.
     HWND topWnd = GetTopLevelHWND(mWnd);
 

widget/src/windows/nsWindow.h

@@ -61,8 +61,6 @@
 #include "nsWindowDbg.h"
 #include "cairo.h"
 #include "nsITimer.h"
-#include "mozilla/TimeStamp.h"
-
 #ifdef CAIRO_HAS_D2D_SURFACE
 #include "gfxD2DSurface.h"
 #endif
@@ -101,7 +99,6 @@ class imgIContainer;
 
 class nsWindow : public nsBaseWidget
 {
-  typedef mozilla::TimeStamp TimeStamp;
   typedef mozilla::widget::WindowHook WindowHook;
 #if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_WIN7
   typedef mozilla::widget::TaskbarWindowPreview TaskbarWindowPreview;
@@ -626,10 +623,6 @@ protected:
   PRBool                mHasTaskbarIconBeenCreated;
 #endif
 
-  // The point in time at which the last paint completed. We use this to avoid
-  //  painting too rapidly in response to frequent input events.
-  TimeStamp mLastPaintEndTime;
-
 #if defined(WINCE_HAVE_SOFTKB)
   static PRBool         sSoftKeyboardState;
 #endif // defined(WINCE_HAVE_SOFTKB)

widget/src/windows/nsWindowGfx.cpp

@@ -642,7 +642,6 @@ PRBool nsWindow::OnPaint(HDC aDC, PRUint32 aNestingLevel)
   }
 
   mPaintDC = nsnull;
-  mLastPaintEndTime = TimeStamp::Now();
 
 #if defined(WIDGET_DEBUG_OUTPUT) && !defined(WINCE)
   if (debug_WantPaintFlashing())