Implement the Instant extended API startMargin, endMargin, and rtl properties and the onmarginchang…

chrome/browser/ui/views/location_bar/location_bar_view.cc

Index: chrome/browser/ui/views/location_bar/location_bar_view.cc
diff --git a/chrome/browser/ui/views/location_bar/location_bar_view.cc b/chrome/browser/ui/views/location_bar/location_bar_view.cc
index ee59f1810df80d6c187de363f216dcd40eb08c02..03e58256af2d44adcca440abf57f40b745bf9617 100644
--- a/chrome/browser/ui/views/location_bar/location_bar_view.cc
+++ b/chrome/browser/ui/views/location_bar/location_bar_view.cc
@@ -8,6 +8,7 @@
 #include <map>
 
 #include "base/command_line.h"
+#include "base/i18n/rtl.h"
 #include "base/stl_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
@@ -27,6 +28,7 @@
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/browser_instant_controller.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/omnibox/location_bar_util.h"
 #include "chrome/browser/ui/omnibox/omnibox_popup_model.h"
@@ -1406,6 +1408,20 @@ int LocationBarView::GetDragOperationsForView(views::View* sender,
       ui::DragDropTypes::DRAG_NONE;
 }
 
+void LocationBarView::OnBoundsChanged(const gfx::Rect& previous_bounds) {
+  if (browser_ && browser_->instant_controller()) {
+    // Pass the side margins of the location bar to the Instant Controller.
+    const gfx::Rect bounds = GetBoundsInScreen();
+    const gfx::Rect parent_bounds = parent()->GetBoundsInScreen();
+    int start = bounds.x();
+    int end =
+        parent_bounds.x() + parent_bounds.width() - bounds.width() - start;
+    if (base::i18n::IsRTL())
+      std::swap(start, end);
+    browser_->instant_controller()->SetMarginSize(start, end);
+  }
+}
+
 bool LocationBarView::CanStartDragForView(View* sender,
                                           const gfx::Point& press_pt,
                                           const gfx::Point& p) {