Don't use drag to corner resizing for unresizable windows

ash/wm/workspace/multi_window_resize_controller.cc

Index: ash/wm/workspace/multi_window_resize_controller.cc
diff --git a/ash/wm/workspace/multi_window_resize_controller.cc b/ash/wm/workspace/multi_window_resize_controller.cc
index 3a330aa2ca69a6d5f5618cc6f2f7c0bdec020bd4..c9cd180266a7f7ef53eccda547511f7ae3a83cbf 100644
--- a/ash/wm/workspace/multi_window_resize_controller.cc
+++ b/ash/wm/workspace/multi_window_resize_controller.cc
@@ -9,6 +9,7 @@
 #include "ash/shell_window_ids.h"
 #include "ash/wm/coordinate_conversion.h"
 #include "ash/wm/window_animations.h"
+#include "ash/wm/window_util.h"
 #include "ash/wm/workspace/workspace_event_handler.h"
 #include "ash/wm/workspace/workspace_window_resizer.h"
 #include "grit/ash_resources.h"
@@ -286,7 +287,8 @@ Window* MultiWindowResizeController::FindWindowByEdge(
   for (Window::Windows::const_reverse_iterator i = windows.rbegin();
        i != windows.rend(); ++i) {
     Window* window = *i;
-    if (window == window_to_ignore || !window->IsVisible())
+    if (window == window_to_ignore || !window->IsVisible() ||
+        !wm::CanResizeWindow(window))

[sky, 2012/11/13 17:01:54]

The multi-window resizer may just move the other window, which is fine. It's the
resizing we need to disallow. You'll need to change WorkspaceWindowResizer where
it calculates how and what to resize.

[Mr4D (OOO till 08-26), 2012/11/13 21:27:23]

After investigating I have figured out that the frame_painter.cc's
NonClientHitTest function is not allowing the window to get resized by not
generating the resize handle codes. As a result of that the
multi_window_resize_controller does not include such windows into a sizing
operation. As such I was removing these two test conditions (since they will
never get called) and the unit test for this condition (which will never happen
at this level).

       continue;
     switch (edge_want) {
       case HTLEFT:
@@ -326,7 +328,7 @@ aura::Window* MultiWindowResizeController::FindWindowTouching(
   for (Window::Windows::const_reverse_iterator i = windows.rbegin();
        i != windows.rend(); ++i) {
     Window* other = *i;
-    if (other == window || !other->IsVisible())
+    if (other == window || !other->IsVisible() || !wm::CanResizeWindow(other))
       continue;
     switch (direction) {
       case TOP_BOTTOM: