Remove IsSecondaryUiMaterial() method.

All calls to this function have been removed and it's no longer in use.

Bug: chromium:867557
Change-Id: I8334510e9fe4b685c7c724f7e35f098435c24bb6
Reviewed-on: https://chromium-review.googlesource.com/1170991Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582295}

ui/base/material_design/material_design_controller.cc

@@ -175,11 +175,6 @@ MaterialDesignController::Mode MaterialDesignController::GetMode() {
   return mode_;
 }
 
-// static
-bool MaterialDesignController::IsSecondaryUiMaterial() {
-  return true;
-}
-
 // static
 bool MaterialDesignController::IsTouchOptimizedUiEnabled() {
   return GetMode() == MATERIAL_TOUCH_OPTIMIZED ||

ui/base/material_design/material_design_controller.h

@@ -38,10 +38,6 @@ class UI_BASE_EXPORT MaterialDesignController {
   // Get the current Mode that should be used by the system.
   static Mode GetMode();
 
-  // Returns true if the current mode is a material design variant and this mode
-  // should be extended to cover secondary UI.
-  static bool IsSecondaryUiMaterial();
-
   // Returns true if the touch-optimized UI material design mode is enabled.
   static bool IsTouchOptimizedUiEnabled();