Move ZoomObserver, ZoomController and ZoomEventManager to components/.

chrome/browser/ui/cocoa/location_bar/zoom_decoration_unittest.mm

Index: chrome/browser/ui/cocoa/location_bar/zoom_decoration_unittest.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/zoom_decoration_unittest.mm b/chrome/browser/ui/cocoa/location_bar/zoom_decoration_unittest.mm
index ec3316c10b4987ebf94dc9ea1332220503bbf592..8747fea170a5ff4edab7290d5300674cea8dd9cd 100644
--- a/chrome/browser/ui/cocoa/location_bar/zoom_decoration_unittest.mm
+++ b/chrome/browser/ui/cocoa/location_bar/zoom_decoration_unittest.mm
@@ -3,8 +3,8 @@
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/location_bar/zoom_decoration.h"
-#include "chrome/browser/ui/zoom/zoom_controller.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
+#include "components/ui/zoom/zoom_controller.h"
 
 namespace {
 
@@ -15,7 +15,7 @@ class MockZoomDecoration : public ZoomDecoration {
   explicit MockZoomDecoration(LocationBarViewMac* owner)
       : ZoomDecoration(owner), update_ui_count_(0) {}
   bool ShouldShowDecoration() const override { return true; }
-  void ShowAndUpdateUI(ZoomController* zoom_controller,
+  void ShowAndUpdateUI(ui_zoom::ZoomController* zoom_controller,
                        NSString* tooltip_string) override {
     ++update_ui_count_;
     ZoomDecoration::ShowAndUpdateUI(zoom_controller, tooltip_string);
@@ -27,10 +27,10 @@ class MockZoomDecoration : public ZoomDecoration {
   DISALLOW_COPY_AND_ASSIGN(MockZoomDecoration);
 };
 
-class MockZoomController : public ZoomController {
+class MockZoomController : public ui_zoom::ZoomController {
  public:
   explicit MockZoomController(content::WebContents* web_contents)
-      : ZoomController(web_contents) {}
+      : ui_zoom::ZoomController(web_contents) {}
   int GetZoomPercent() const override { return zoom_percent_; }
 
   int zoom_percent_;