cc: Don't use partial updates for scrollbars when they are not allowed.

cc/layer_tree_settings.cc

Index: cc/layer_tree_settings.cc
diff --git a/cc/layer_tree_settings.cc b/cc/layer_tree_settings.cc
index 4221167c29fa139a0ed67d473ea6deccda6bc79e..f8b964307a539c30527ac2d1701c903def2912a8 100644
--- a/cc/layer_tree_settings.cc
+++ b/cc/layer_tree_settings.cc
@@ -26,6 +26,7 @@ LayerTreeSettings::LayerTreeSettings()
     , showOverdrawInTracing(false)
     , canUseLCDText(true)
     , shouldClearRootRenderPass(true)
+    , useLinearFadeScrollbarAnimator(false)
     , refreshRate(0)
     , maxPartialTextureUpdates(std::numeric_limits<size_t>::max())
     , numRasterThreads(1)
@@ -46,6 +47,16 @@ LayerTreeSettings::LayerTreeSettings()
     canUseLCDText = false;
 #endif
 
+#if defined(OS_ANDROID)
+    // TODO(danakj): Move this out to the android code.
+    maxPartialTextureUpdates = 0;
+#endif
+
+#if defined(OS_ANDROID)
+    // TODO(danakj): Move this out to the android code.
+    useLinearFadeScrollbarAnimator = true;
+#endif
+
     initialDebugState.showPropertyChangedRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowPropertyChangedRects);
     initialDebugState.showSurfaceDamageRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowSurfaceDamageRects);
     initialDebugState.showScreenSpaceRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowScreenSpaceRects);