Implement IsSearchProviderInstalled and a test for it.

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index 3a419cc266c89379ddb6e146920f1cd0ce1c5d1d..7fd8608b5bd0d8a473ea76600283b323e2f4e7a3 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -147,6 +147,56 @@ struct ViewMsg_StopFinding_Params {
   Action action;
 };
 
+// The install state of the search provider (not installed, installed, default).
+struct ViewHostMsg_GetSearchProviderInstallState_Params {
+  enum State {
+    // Equates to an access denied error.
+    DENIED = -1,
+
+    // DON'T CHANGE THE VALUES BELOW.
+    // All of the following values are manidated by the
+    // spec for window.external.IsSearchProviderInstalled.
+
+    // The search provider is not installed.
+    NOT_INSTALLED = 0,
+
+    // The search provider is in the user's set but is not
+    INSTALLED_BUT_NOT_DEFAULT = 1,
+
+    // The search provider is set as the user's default.
+    INSTALLED_AS_DEFAULT = 2
+  };
+  State state;
+
+  ViewHostMsg_GetSearchProviderInstallState_Params()
+    : state(DENIED) {

[sky, 2010/07/15 23:24:49]

indent 4

+  }
+
+  explicit ViewHostMsg_GetSearchProviderInstallState_Params(State s)
+    : state(s) {

[sky, 2010/07/15 23:24:49]

indent 4

+  }
+
+  static ViewHostMsg_GetSearchProviderInstallState_Params Denied() {
+    return ViewHostMsg_GetSearchProviderInstallState_Params(DENIED);
+  }
+
+  static ViewHostMsg_GetSearchProviderInstallState_Params NotInstalled() {
+    return ViewHostMsg_GetSearchProviderInstallState_Params(NOT_INSTALLED);
+  }
+
+  static ViewHostMsg_GetSearchProviderInstallState_Params
+      InstallButNotDefault() {
+    return ViewHostMsg_GetSearchProviderInstallState_Params(
+        INSTALLED_BUT_NOT_DEFAULT);
+  }
+
+  static ViewHostMsg_GetSearchProviderInstallState_Params InstalledAsDefault() {
+    return ViewHostMsg_GetSearchProviderInstallState_Params(
+        INSTALLED_AS_DEFAULT);
+  }
+};
+
+
 // Parameters structure for ViewHostMsg_FrameNavigate, which has too many data
 // parameters to be reasonably put in a predefined IPC message.
 struct ViewHostMsg_FrameNavigate_Params {
@@ -949,6 +999,49 @@ struct ParamTraits<FontDescriptor> {
   }
 };
 
+// Traits for ViewHostMsg_GetSearchProviderInstallState_Params structure to
+// pack/unpack.
+template <>
+struct ParamTraits<ViewHostMsg_GetSearchProviderInstallState_Params> {
+  typedef ViewHostMsg_GetSearchProviderInstallState_Params param_type;
+  static void Write(Message* m, const param_type& p) {
+    m->WriteInt(p.state);
+  }
+  static bool Read(const Message* m, void** iter, param_type* p) {
+    int type;
+    if (!m->ReadInt(iter, &type))
+      return false;
+    p->state = static_cast<param_type::State>(type);
+    return true;
+  }
+  static void Log(const param_type& p, std::wstring* l) {
+    std::wstring state;
+    switch (p.state) {
+      case ViewHostMsg_GetSearchProviderInstallState_Params::DENIED:
+        state = L"ViewHostMsg_GetSearchProviderInstallState_Params::DENIED";
+        break;
+      case ViewHostMsg_GetSearchProviderInstallState_Params::NOT_INSTALLED:
+        state =
+            L"ViewHostMsg_GetSearchProviderInstallState_Params::NOT_INSTALLED";
+        break;
+      case ViewHostMsg_GetSearchProviderInstallState_Params::
+          INSTALLED_BUT_NOT_DEFAULT:
+        state = L"ViewHostMsg_GetSearchProviderInstallState_Params::"
+                L"INSTALLED_BUT_NOT_DEFAULT";
+        break;
+      case ViewHostMsg_GetSearchProviderInstallState_Params::
+          INSTALLED_AS_DEFAULT:
+        state = L"ViewHostMsg_GetSearchProviderInstallState_Params::"
+                L"INSTALLED_AS_DEFAULT";
+        break;
+      default:
+        state = L"UNKNOWN";
+        break;
+    }
+    LogParam(state, l);
+  }
+};
+
 // Traits for ViewHostMsg_FrameNavigate_Params structure to pack/unpack.
 template <>
 struct ParamTraits<ViewHostMsg_FrameNavigate_Params> {