[DevTools] Get rid of floats in treeoutline.

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 b6db18544775fec7ce30c5e808f33cea1593b7be..4a23d4268f5b88ae38ebe2d26ec9f0f4a8da4576 100644
--- a/third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.css
+++ b/third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.css
@@ -174,9 +174,14 @@
     margin-left: 11px;
 }
 
+.watch-expression-object-header .watch-expression-title {
+    margin-left: 1px;
+}
+
 .watch-expression {
     position: relative;
     padding: 1px 0px 1px 6px;
+    flex: none;
 }
 
 .watch-expressions .name {
@@ -208,6 +213,15 @@
     margin-left: 12px;
 }
 
+.watch-expression-header {
+    flex: auto;
+}
+
+.watch-expression-object-header {
+    margin-left: -12px;
+    padding-left: 12px;
+}
+
 .watch-expression-header:hover {
     background-color: #F0F0F0;
     padding-right: 14px;
@@ -217,6 +231,10 @@
     margin-top: 0px;
 }
 
+.scope-chain-sidebar-pane-section-header {
+    flex: auto;
+}
+
 .scope-chain-sidebar-pane-section-subtitle {
     float: right;
     margin-left: 5px;