DevTools: control touch emulation from the browser side only.

content/browser/renderer_host/input/touch_emulator.h

Index: content/browser/renderer_host/input/touch_emulator.h
diff --git a/content/browser/renderer_host/input/touch_emulator.h b/content/browser/renderer_host/input/touch_emulator.h
index aef7899adfdfa2fb93f3259a2c2ee938daf89bf9..467dbda5dd76bcc4fb6c9eb966e6d280255ff4c4 100644
--- a/content/browser/renderer_host/input/touch_emulator.h
+++ b/content/browser/renderer_host/input/touch_emulator.h
@@ -20,7 +20,7 @@ class CONTENT_EXPORT TouchEmulator : public ui::GestureProviderClient {
   explicit TouchEmulator(TouchEmulatorClient* client);
   virtual ~TouchEmulator();
 
-  void Enable(bool allow_pinch);
+  void Enable();
   void Disable();
 
   // Note that TouchEmulator should always listen to touch events and their acks
@@ -74,7 +74,6 @@ class CONTENT_EXPORT TouchEmulator : public ui::GestureProviderClient {
   // Disabled emulator does only process touch acks left from previous
   // emulation. It does not intercept any events.
   bool enabled_;
-  bool allow_pinch_;
 
   // While emulation is on, default cursor is touch. Pressing shift changes
   // cursor to the pinch one.