Ash: Use right edge of screen to scroll maximized windows

chrome/browser/ui/views/frame/browser_frame_aura.cc

Index: chrome/browser/ui/views/frame/browser_frame_aura.cc
diff --git a/chrome/browser/ui/views/frame/browser_frame_aura.cc b/chrome/browser/ui/views/frame/browser_frame_aura.cc
index e0d1993d6092fe2821845392569af0240fbde70c..24eea1a6189f77c80ec7344970891f3194ee7196 100644
--- a/chrome/browser/ui/views/frame/browser_frame_aura.cc
+++ b/chrome/browser/ui/views/frame/browser_frame_aura.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/ui/views/frame/browser_frame_aura.h"
 
+#include "ash/wm/frame_painter.h"
+#include "ash/wm/window_util.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/frame/system_menu_model_delegate.h"
@@ -36,6 +38,15 @@ class BrowserFrameAura::WindowPropertyWatcher : public aura::WindowObserver {
     if (key != aura::client::kShowStateKey)
       return;
 
+    // Maximized windows don't want resize handles overlapping the content area,
+    // because when the user moves the cursor to the right screen edge we want
+    // them to be able to hit the scroll bar.
+    window->SetHitTestBoundsOverride(
+        ash::FramePainter::kResizeOutsideBoundsSize,
+        ash::wm::IsWindowMaximized(window) ?
+            0 :
+            ash::FramePainter::kResizeInsideBoundsSize);
+
     // Allow the frame to be replaced when maximizing an app.
     if (browser_frame_->non_client_view() &&
         browser_frame_aura_->browser_view()->browser()->is_app())