Use more accurate strings for plug-in content settings.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 7c45527ee719f473be625ec923fbf15f4ee99dcd..dc08fecbb40da27d29392829d3f8ac1b71c19722 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -7825,12 +7825,19 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_PLUGIN_LOAD_RADIO" desc="A radio button in the Content Settings dialog for allowing plug-ins use on any site.">
         Run automatically (recommended)
       </message>
-      <message name="IDS_PLUGIN_ASK_RADIO" desc="A radio button in the Content Settings dialog for allowing plug-ins use on any site.">
+      <message name="IDS_PLUGIN_ASK_RADIO" desc="A radio button in the Content Settings dialog for gating plug-ins on a mouse click (left button).">
         Click to play
       </message>
-      <message name="IDS_PLUGIN_NOLOAD_RADIO" desc="A radio button in the Content Settings dialog for preventing plug-ins use on any site.">
-        Block all
-      </message>
+      <if expr="is_macosx">
+        <message name="IDS_PLUGIN_ASK_MENU_RADIO" desc="A radio button in the Content Settings dialog for gating plug-ins on a context menu activation ('right-click').">
+          Option-click to play

[Evan Stade, 2014/10/18 00:21:49]

isn't there some weird icon for "Option"?

[palmer, 2014/10/18 00:43:27]

No, that's Command (⌘).

[Bernhard Bauer, 2014/10/20 09:40:48]

Option-click doesn't open a context menu on Mac, Ctrl-click does. But so does
right-clicking, for that matter (assuming that the mouse is set to right-handed,
otherwise it's left-clicking; that's why it's technically "secondary mouse
button"). And really, neither of right-clicking or ctrl-clicking immediately
runs the plugin, it just opens the context menu where you can choose to run the
plugin. If we want to make this accurate, how about "Run via context menu"?

[Evan Stade, 2014/10/20 15:05:17]

Do people know what a 'context menu' is? I think "Right click to play" makes
sense; it's shorthand for "you must right click in order to play", which is
true, although it's not the only step.

[Bernhard Bauer, 2014/10/20 15:25:40]

My guess is that the number of people who know what a context menu is is bigger
than the number of people who know what a plugin is...

The Apple HIG actually only mentions "Control-clicking" (with "Control"
capitalized and spelled out) as the way to open a contextual menu. If we don't
want to directly mention the menu, I would then go with "Control-click to play".

+        </message>
+      </if>
+      <if expr="not is_macosx">
+        <message name="IDS_PLUGIN_ASK_MENU_RADIO" desc="A radio button in the Content Settings dialog for gating plug-ins on a context menu activation ('right-click').">
+          Right-click to play
+        </message>
+      </if>
       <message name="IDS_PLUGIN_SELECTIVE_DISABLE" desc="Link to selectively disable plug-ins">
         Disable individual plug-ins...
       </message>