Rewrite std::string("") to std::string(), Linux edition.

content/browser/gpu/gpu_memory_test.cc

Index: content/browser/gpu/gpu_memory_test.cc
diff --git a/content/browser/gpu/gpu_memory_test.cc b/content/browser/gpu/gpu_memory_test.cc
index 36584c39305be4275651aef97c48a6140b9ef621..832b947bce581e1858e4e008941240aec91c836b 100644
--- a/content/browser/gpu/gpu_memory_test.cc
+++ b/content/browser/gpu/gpu_memory_test.cc
@@ -116,12 +116,8 @@ class GpuMemoryTest : public ContentBrowserTest {
     js_call << mb_to_use;
     js_call << ");";
     std::string message;
-    ASSERT_TRUE(
-        ExecuteScriptInFrameAndExtractString(
-        tab_to_load->web_contents(),
-        "",
-        js_call.str(),
-        &message));
+    ASSERT_TRUE(ExecuteScriptInFrameAndExtractString(
+        tab_to_load->web_contents(), std::string(), js_call.str(), &message));
     EXPECT_EQ("DONE_USE_GPU_MEMORY", message);
   }
 
@@ -196,12 +192,8 @@ class GpuMemoryTest : public ContentBrowserTest {
             "  domAutomationController.send(\"DONE_RAF\");"
             "})");
         std::string message;
-        ASSERT_TRUE(
-            ExecuteScriptInFrameAndExtractString(
-            (*it)->web_contents(),
-            "",
-            js_call,
-            &message));
+        ASSERT_TRUE(ExecuteScriptInFrameAndExtractString(
+            (*it)->web_contents(), std::string(), js_call, &message));
         EXPECT_EQ("DONE_RAF", message);
       }
       // TODO(ccameron): send an IPC from Browser -> Renderer (delay it until