Created min size for print preview dialog and modified to allow the

chrome/browser/printing/print_preview_dialog_controller.cc

Index: chrome/browser/printing/print_preview_dialog_controller.cc
diff --git a/chrome/browser/printing/print_preview_dialog_controller.cc b/chrome/browser/printing/print_preview_dialog_controller.cc
index 780928be53474d99790f012a18a42736c78587d5..2e7dcaf22ef9bce68e39986ee9ba32b7940c2e52 100644
--- a/chrome/browser/printing/print_preview_dialog_controller.cc
+++ b/chrome/browser/printing/print_preview_dialog_controller.cc
@@ -77,9 +77,11 @@ PrintPreviewDialogDelegate::~PrintPreviewDialogDelegate() {
 }
 
 ui::ModalType PrintPreviewDialogDelegate::GetDialogModalType() const {
-  // Not used, returning dummy value.
-  NOTREACHED();
+#if defined(USE_AURA)
   return ui::MODAL_TYPE_WINDOW;
+#else
+  return ui::MODAL_TYPE_CHILD;
+#endif
 }
 
 base::string16 PrintPreviewDialogDelegate::GetDialogTitle() const {
@@ -98,8 +100,15 @@ void PrintPreviewDialogDelegate::GetWebUIMessageHandlers(
 
 void PrintPreviewDialogDelegate::GetDialogSize(gfx::Size* size) const {
   DCHECK(size);
-  const gfx::Size kMinDialogSize(800, 480);
   const int kBorder = 25;
+// Gives ChromeOS dialogs the requested minimum size of 438x455 without
+// changing the existing behavior on Mac OSX. For all other platforms, the min
+// size is later overridden by the size of the parent window.
+#if defined(OS_MACOSX)
+  const gfx::Size kMinDialogSize(800, 480);
+#else
+  const gfx::Size kMinDialogSize(438, 455);
+#endif
   *size = kMinDialogSize;
 
   web_modal::WebContentsModalDialogHost* host = nullptr;
@@ -113,7 +122,15 @@ void PrintPreviewDialogDelegate::GetDialogSize(gfx::Size* size) const {
     size->SetToMax(host->GetMaximumDialogSize());
   else
     size->SetToMax(outermost_web_contents->GetContainerBounds().size());
+#if defined(OS_MACOSX)
   size->Enlarge(-2 * kBorder, -kBorder);
+#else
+  int shrink_width =
+      std::max(kMinDialogSize.width() - size->width(), -2 * kBorder);
+  int shrink_height =
+      std::max(kMinDialogSize.height() - size->height(), -kBorder);
+  size->Enlarge(shrink_width, shrink_height);
+#endif
 
 #if defined(OS_MACOSX)
   // Limit the maximum size on MacOS X.
@@ -144,6 +161,11 @@ bool PrintPreviewDialogDelegate::ShouldShowDialogTitle() const {
 
 namespace printing {
 
+ui::WebDialogDelegate * GetPrintPreviewDialogDelegate(
+    content::WebContents * initiator) {
+  return new PrintPreviewDialogDelegate(initiator);
+}
+
 PrintPreviewDialogController::PrintPreviewDialogController()
     : waiting_for_new_preview_page_(false),
       is_creating_print_preview_dialog_(false) {
@@ -362,15 +384,20 @@ void PrintPreviewDialogController::OnNavEntryCommitted(
   RemoveInitiator(contents);
 }
 
+ConstrainedWebDialogDelegate* PrintPreviewDialogController::
+    GetWebDialogDelegate(WebContents* initiator) {
+  return ShowConstrainedWebDialog(
+          initiator->GetBrowserContext(),
+          new PrintPreviewDialogDelegate(initiator), initiator);
+}
+
 WebContents* PrintPreviewDialogController::CreatePrintPreviewDialog(
     WebContents* initiator) {
   base::AutoReset<bool> auto_reset(&is_creating_print_preview_dialog_, true);
 
   // The dialog delegates are deleted when the dialog is closed.
   ConstrainedWebDialogDelegate* web_dialog_delegate =
-      ShowConstrainedWebDialog(initiator->GetBrowserContext(),
-                               new PrintPreviewDialogDelegate(initiator),
-                               initiator);
+      GetWebDialogDelegate(initiator);
 
   WebContents* preview_dialog = web_dialog_delegate->GetWebContents();