[DevTools] Remove a bunch of styles from inspectorStyle.css.

third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.css

Index: third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.css
diff --git a/third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.css b/third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.css
index 2180da254960cd57e63e343c044f9c874c25b268..a0a5247a55d5e3450dd17490fd5f93c9886ce1a5 100644
--- a/third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.css
+++ b/third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.css
@@ -74,6 +74,10 @@
     transform: rotate(-90deg);
 }
 
+.object-popover-container {
+    display: inline-block;
+}
+
 .function-popover-title {
     border-bottom: 1px solid #AAA;
     margin-bottom: 3px;
@@ -181,6 +185,14 @@
     overflow: hidden;
 }
 
+.watch-expression-error {
+    color: red;
+}
+
+.-theme-with-dark-background .watch-expression-error {
+    color: hsl(0, 100%, 65%);
+}
+
 .watch-expressions-separator {
     flex: none;
 }