Added replacement_range to ImeSetComposition

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 18dcf46ae16625f71ab8488c275e21f62b1aa4f4..8a3376f0766893a0cfc44a235ca79349dbbde5f0 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -2150,6 +2150,7 @@ void RenderWidgetHostViewMac::OnDisplayMetricsChanged(
   markedText_.clear();
   markedTextSelectedRange_ = NSMakeRange(NSNotFound, 0);
   underlines_.clear();
+  setMarkedTextReplacementRange_ = gfx::Range::InvalidRange();
   unmarkTextCalled_ = NO;
   hasEditCommands_ = NO;
   editCommands_.clear();
@@ -2235,6 +2236,7 @@ void RenderWidgetHostViewMac::OnDisplayMetricsChanged(
     // When marked text is available, |markedTextSelectedRange_| will be the
     // range being selected inside the marked text.
     widgetHost->ImeSetComposition(markedText_, underlines_,
+                                  setMarkedTextReplacementRange_,
                                   markedTextSelectedRange_.location,
                                   NSMaxRange(markedTextSelectedRange_));
   } else if (oldHasMarkedText && !hasMarkedText_ && !textInserted) {
@@ -2246,6 +2248,9 @@ void RenderWidgetHostViewMac::OnDisplayMetricsChanged(
     }
   }
 
+  // Clear information got from |interpretKeyEvents:|

[erikchen, 2016/01/26 18:25:01]

s/got//

+  setMarkedTextReplacementRange_ = gfx::Range::InvalidRange();
+
   // If the key event was handled by the input method but it also generated some
   // edit commands, then we need to send the real key event and corresponding
   // edit commands here. This usually occurs when the input method wants to
@@ -3097,9 +3102,11 @@ extern NSString *NSTextInputReplacementRangeAttributeName;
   // is empty to update the input method state. (Our input method backend can
   // automatically cancels an ongoing composition when we send an empty text.
   // So, it is OK to send an empty text to the renderer.)
-  if (!handlingKeyDown_) {
+  if (handlingKeyDown_) {
+    setMarkedTextReplacementRange_ = gfx::Range(replacementRange);
+  } else {
     renderWidgetHostView_->render_widget_host_->ImeSetComposition(
-        markedText_, underlines_,
+        markedText_, underlines_, gfx::Range(replacementRange),
         newSelRange.location, NSMaxRange(newSelRange));
   }
 }