Chromium compositor change implementing page-scale driven pinch-zoom.

cc/CCSettings.cpp

Index: cc/CCSettings.cpp
===================================================================
--- cc/CCSettings.cpp	(revision 160422)
+++ cc/CCSettings.cpp	(working copy)
@@ -12,6 +12,7 @@
 static bool s_perTilePaintingEnabled = false;
 static bool s_partialSwapEnabled = false;
 static bool s_acceleratedAnimationEnabled = false;
+static bool s_pageScalePinchZoomEnabled = false;
 } // namespace
 
 namespace cc {
@@ -25,6 +26,9 @@
 bool CCSettings::acceleratedAnimationEnabled() { return s_acceleratedAnimationEnabled; }
 void CCSettings::setAcceleratedAnimationEnabled(bool enabled) { s_acceleratedAnimationEnabled = enabled; }
 
+bool CCSettings::pageScalePinchZoomEnabled() { return s_pageScalePinchZoomEnabled; }
+void CCSettings::setPageScalePinchZoomEnabled(bool enabled) { s_pageScalePinchZoomEnabled = enabled; }
+
 bool CCSettings::jankInsteadOfCheckerboard()
 {
     return CommandLine::ForCurrentProcess()->HasSwitch(switches::kJankInsteadOfCheckerboard);
@@ -40,6 +44,7 @@
     s_perTilePaintingEnabled = false;
     s_partialSwapEnabled = false;
     s_acceleratedAnimationEnabled = false;
+    s_pageScalePinchZoomEnabled = false;
 }
 
 } // namespace cc