Make sure that 30%of restored window is always visible.

ash/wm/base_layout_manager.h

Index: ash/wm/base_layout_manager.h
diff --git a/ash/wm/base_layout_manager.h b/ash/wm/base_layout_manager.h
index 7fe25e5fe678418612880e32d2fe1d1e6422f110..5a0b566da97dd8d32415e08cc7fcb382ab4686b5 100644
--- a/ash/wm/base_layout_manager.h
+++ b/ash/wm/base_layout_manager.h
@@ -77,8 +77,8 @@ class ASH_EXPORT BaseLayoutManager
 
  protected:
   enum AdjustWindowReason {
-    ADJUST_WINDOW_SCREEN_SIZE_CHANGED,
-    ADJUST_WINDOW_DISPLAY_INSETS_CHANGED,
+    ADJUST_WINDOW_DISPLAY_SIZE_CHANGED,
+    ADJUST_WINDOW_WORK_AREA_INSETS_CHANGED,
     ADJUST_WINDOW_WINDOW_ADDED
   };
 
@@ -86,18 +86,20 @@ class ASH_EXPORT BaseLayoutManager
   virtual void ShowStateChanged(aura::Window* window,
                                 ui::WindowShowState last_show_state);
 
-  // Adjusts the window sizes when the screen changes its size or its
-  // work area insets. If this is called for a screen size change (i.e. |reason|
+  // Adjusts the window's bounds when the display area changes for given
+  // window. This happens when the display size, work area insets or
+  // the display on which the window exists has changd.
+  // If this is called for a display size change (i.e. |reason|
   // is ADJUST_WINDOW_SCREEN_SIZE_CHANGED), the non-maximized/non-fullscreen
   // windows are readjusted to make sure the window is completely within the
   // display region. Otherwise, it makes sure at least some parts of the window
   // is on display.
-  virtual void AdjustWindowSizesForScreenChange(AdjustWindowReason reason);
+  virtual void AdjustWindowsBoundsForWorkAreaChange(AdjustWindowReason reason);
 
   // Adjusts the sizes of the specific window in respond to a screen change or
   // display-area size change.
-  virtual void AdjustWindowSizeForScreenChange(aura::Window* window,
-                                               AdjustWindowReason reason);
+  virtual void AdjustWindowBounds(aura::Window* window,
+                                  AdjustWindowReason reason);
 
   aura::RootWindow* root_window() { return root_window_; }