wip: Touch Text Selection Prototypes

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index b821a9f8d7ddfbcb9963e21ffa724b51f7a5ba47..09803ee7f6e391d1be2041adf1be53492ecae289 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -2373,8 +2373,28 @@ void RenderWidgetHostViewAura::InitSelectionController(
       ui::TouchSelectionControllerAuraClient* selection_controller_client) {
   DCHECK(!selection_controller_client_);
   selection_controller_client_.reset(selection_controller_client);
+  ui::TextSelectionGranularityStrategy strategy =
+      ui::GRANULARITY_STRATEGY_DEFAULT;
+  const std::string strategy_str = base::CommandLine::ForCurrentProcess()->
+        GetSwitchValueASCII(switches::kTouchTextSelectionStrategy);
+  if (strategy_str == "1")
+    strategy = ui::GRANULARITY_STRATEGY_DIRECTION;
+  else if (strategy_str == "2")
+    strategy = ui::GRANULARITY_STRATEGY_VELOCITY;
   selection_controller_.reset(
-      new ui::TouchSelectionControllerAura(selection_controller_client));
+      new ui::TouchSelectionControllerAura(selection_controller_client,
+                                           strategy));
+  const std::string decay_str = base::CommandLine::ForCurrentProcess()->
+        GetSwitchValueASCII(switches::kTouchTextSelectionHalfDecay);
+  const std::string threshold_str = base::CommandLine::ForCurrentProcess()->
+        GetSwitchValueASCII(switches::kTouchTextSelectionThreshold);
+  if (!decay_str.empty() && !threshold_str.empty()) {
+    int decay_ms = atoi(decay_str.c_str());
+    int threshold = atoi(threshold_str.c_str());
+    if (decay_ms && threshold)
+      selection_controller_->SetVelocityStrategyParameters(decay_ms, threshold);
+  }
+
 }
 
 void RenderWidgetHostViewAura::SnapToPhysicalPixelBoundary() {