Use a placeholder instead of the default plugin for missing plug-ins on Mac and Linux.

chrome/common/render_messages.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 // TODO(erg): This list has been temporarily annotated by erg while doing work
 // on which headers to pull out.
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "base/string16.h"
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/common/common_param_traits.h"
 #include "chrome/common/instant_types.h"
 #include "chrome/common/nacl_types.h"
 #include "chrome/common/search_provider.h"
 #include "chrome/common/thumbnail_score.h"
 #include "chrome/common/translate_errors.h"
 #include "content/common/common_param_traits.h"
+#include "content/common/webkit_param_traits.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCache.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebConsoleMessage.h"
 #include "ui/gfx/rect.h"
 
 // Singly-included section for enums and custom IPC traits.
 #ifndef CHROME_COMMON_RENDER_MESSAGES_H_
 #define CHROME_COMMON_RENDER_MESSAGES_H_
 
 class SkBitmap;
 
 // Command values for the cmd parameter of the
 // ViewHost_JavaScriptStressTestControl message. For each command the parameter
 // passed has a different meaning:
 // For the command kJavaScriptStressTestSetStressRunType the parameter it the
 // type taken from the enumeration v8::Testing::StressType.
 // For the command kJavaScriptStressTestPrepareStressRun the parameter it the
 // number of the stress run about to take place.
 enum ViewHostMsg_JavaScriptStressTestControl_Commands {
   kJavaScriptStressTestSetStressRunType = 0,
   kJavaScriptStressTestPrepareStressRun = 1,
 };
 
+// This enum is inside a struct so that we can forward-declare the struct in
+// others headers without having to include this one.
+struct ChromeViewHostMsg_GetPluginInfo_Status {
+  // TODO(bauerb): Add more status values (blocked, click-to-play, out of date,
+  // requires authorization).
+  enum Value {
+    kAllowed,
+    kDisabled,
+    kNotFound,
+  };
+
+  ChromeViewHostMsg_GetPluginInfo_Status() : value(kAllowed) {}
+
+  Value value;
+};
+
 namespace IPC {
 
 #if defined(OS_POSIX) && !defined(USE_AURA)
 
 // TODO(port): this shouldn't exist. However, the plugin stuff is really using
 // HWNDS (NativeView), and making Windows calls based on them. I've not figured
 // out the deal with plugins yet.
 template <>
 struct ParamTraits<gfx::NativeView> {
   typedef gfx::NativeView param_type;
@@ skipping 21 matching lines @@
   static bool Read(const Message* m, void** iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_RENDER_MESSAGES_H_
 
 #define IPC_MESSAGE_START ChromeMsgStart
 
+IPC_ENUM_TRAITS(ChromeViewHostMsg_GetPluginInfo_Status::Value)
 IPC_ENUM_TRAITS(InstantCompleteBehavior)
 IPC_ENUM_TRAITS(search_provider::OSDDType)
 IPC_ENUM_TRAITS(search_provider::InstallState)
 IPC_ENUM_TRAITS(TranslateErrors::Type)
 IPC_ENUM_TRAITS(WebKit::WebConsoleMessage::Level)
 
+IPC_STRUCT_TRAITS_BEGIN(ChromeViewHostMsg_GetPluginInfo_Status)
+IPC_STRUCT_TRAITS_MEMBER(value)
+IPC_STRUCT_TRAITS_END()
+
 IPC_STRUCT_TRAITS_BEGIN(ThumbnailScore)
   IPC_STRUCT_TRAITS_MEMBER(boring_score)
   IPC_STRUCT_TRAITS_MEMBER(good_clipping)
   IPC_STRUCT_TRAITS_MEMBER(at_top)
   IPC_STRUCT_TRAITS_MEMBER(time_at_snapshot)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(WebKit::WebCache::ResourceTypeStat)
   IPC_STRUCT_TRAITS_MEMBER(count)
   IPC_STRUCT_TRAITS_MEMBER(size)
@@ skipping 267 matching lines @@
 //
 // If |setting| is set to CONTENT_SETTING_DEFAULT, the plug-in is
 // neither blocked nor white-listed, which means that it's allowed
 // by default and can still be blocked if it's non-sandboxed.
 //
 IPC_SYNC_MESSAGE_CONTROL2_1(ChromeViewHostMsg_GetPluginContentSetting,
                             GURL /* policy_url */,
                             std::string  /* resource */,
                             ContentSetting /* setting */)
 
+// Return information about a plugin for the given URL and MIME type.
+// In contrast to ViewHostMsg_GetPluginInfo in content/, this IPC call knows
+// about specific reasons why a plug-in can't be used, for example because it's
+// disabled.
+IPC_SYNC_MESSAGE_CONTROL4_3(ChromeViewHostMsg_GetPluginInfo,
+                            int /* render_view_id */,
+                            GURL /* url */,
+                            GURL /* top origin url */,
+                            std::string /* mime_type */,
+                            ChromeViewHostMsg_GetPluginInfo_Status /* status */,
+                            webkit::WebPluginInfo /* plugin */,
+                            std::string /* actual_mime_type */)
+
 // Specifies the URL as the first parameter (a wstring) and thumbnail as
 // binary data as the second parameter.
 IPC_MESSAGE_ROUTED3(ChromeViewHostMsg_Thumbnail,
                     GURL /* url */,
                     ThumbnailScore /* score */,
                     SkBitmap /* bitmap */)
 
 // Send a snapshot of the tab contents to the render host.
 IPC_MESSAGE_ROUTED1(ChromeViewHostMsg_Snapshot,
                     SkBitmap /* bitmap */)
@@ skipping 164 matching lines @@
 // previous SetCookie message to be processed.
 IPC_SYNC_MESSAGE_ROUTED2_1(ChromeViewHostMsg_GetCookies,
                            GURL /* url */,
                            GURL /* first_party_for_cookies */,
                            std::string /* cookies */)
 
 // Provide the browser process with current renderer framerate.
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_FPS,
                      int /* routing id */,
                      float /* frames per second */)